feat(): add slide-toggle component.

src/components/slide-toggle/README.md

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+# MdSlideToggle
+`MdSlideToggle` is a two-state control, which can be also called `switch`
+
+### Screenshots
+![image](https://cloud.githubusercontent.com/assets/4987015/14860895/25cc0dc0-0cab-11e6-9e57-9f6d513444b1.png)
+
+## `<md-slide-toggle>`
+### Bound Properties
+
+| Name | Type | Description |
+| --- | --- | --- |
+| `disabled` | boolean | Disables the `slide-toggle` |
+| `color` | `"primary" | "accent" | "warn"` | The color palette of the `slide-toggle` |
+| `checked` | boolean | Sets the value of the `slide-toggle` |
+
+### Events
+| Name | Type | Description |
+| --- | --- | --- |
+| `change` | boolean | Event will be emitted on every value change.<br/>It emits the new `checked` value. |
+
+### Examples
+A basic slide-toggle would have the following markup.
+```html
+<md-slide-toggle [(ngModel)]="slideToggleModel">
+  Default Slide Toggle
+</md-slide-toggle>
+```
+
+Slide toggle can be also disabled.
+```html
+<md-slide-toggle disabled>
+  Disabled Slide Toggle
+</md-slide-toggle>
+```
+
+The `slide-toggle` can be also set to checked without a `ngModel`
+```html
+<md-slide-toggle [checked]="isChecked">
+  Input Binding
+</md-slide-toggle>
+```
+
+You may also want to listen on changes of the `slide-toggle`<br/>
+The `slide-toggle` always emits the new value to the event binding `(change)`
+```html
+<md-slide-toggle (change)="printValue($event)">
+  Prints Value on Change
+</md-slide-toggle>
+```
+
+## Theming
+A slide-toggle is default using the `accent` palette for its styling.
+
+Modifying the color on a `slide-toggle` can be easily done, by using the following markup.
+```html
+<md-slide-toggle color="primary">
+  Primary Slide Toggle
+</md-slide-toggle>
+```
+
+The color can be also set dynamically by using a property binding.
+```html
+<md-slide-toggle [color]="myColor">
+  Dynamic Color
+</md-slide-toggle>
+```

src/components/slide-toggle/slide-toggle.html

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+<label class="md-slide-toggle-label">
+  <div class="md-slide-toggle-container">
+    <div class="md-slide-toggle-bar"></div>
+    <div class="md-slide-toggle-thumb-container">
+      <div class="md-slide-toggle-thumb"></div>
+    </div>
+
+    <input #input class="md-slide-toggle-checkbox" type="checkbox"
+           [id]="getInputId()"
+           [tabIndex]="tabIndex"
+           [checked]="checked"
+           [disabled]="disabled"
+           [attr.name]="name"
+           [attr.aria-label]="ariaLabel"
+           [attr.aria-labelledby]="ariaLabelledby"
+           (blur)="onTouched()"
+           (change)="onChangeEvent()">
+  </div>
+  <span class="md-slide-toggle-content">
+    <ng-content></ng-content>
+  </span>
+</label>

src/components/slide-toggle/slide-toggle.scss

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+@import "../../core/style/variables";
+@import "../../core/style/mixins";
+@import "../../core/style/elevation";
+
+//TODO(): remove the default theme.
+@import "../../core/style/default-theme";
+
+$md-slide-toggle-width: 36px !default;
+$md-slide-toggle-height: 24px !default;
+$md-slide-toggle-bar-height: 14px !default;
+$md-slide-toggle-thumb-size: 20px !default;
+$md-slide-toggle-margin: 16px !default;
+
+@mixin md-switch-checked($palette) {
+  .md-slide-toggle-thumb {
+    background-color: md-color($palette);
+  }
+
+  .md-slide-toggle-bar {
+    background-color: md-color($palette, 0.5);
+  }
+}
+
+:host {
+  display: flex;
+  height: $md-slide-toggle-height;
+
+  margin: $md-slide-toggle-margin 0;
+  line-height: $md-slide-toggle-height;
+
+  white-space: nowrap;
+  user-select: none;
+
+  outline: none;
+
+  &.md-checked {
+    @include md-switch-checked($md-accent);
+
+    &.md-primary {
+      @include md-switch-checked($md-primary);
+    }
+
+    &.md-warn {
+      @include md-switch-checked($md-warn);
+    }
+
+    .md-slide-toggle-thumb-container {
+      transform: translate3d(100%, 0, 0);
+    }
+  }
+
+  &.md-disabled {
+
+    .md-slide-toggle-label, .md-slide-toggle-container {
+      cursor: default;
+    }
+
+    .md-slide-toggle-thumb {
+      background-color: md-color($md-background, slide-toggle-thumb);
+    }
+    .md-slide-toggle-bar {
+      background-color: md-color($md-foreground, divider);
+    }
+  }
+}
+
+// The label is our root container for the slide-toggle / switch indicator and label text.
+// It has to be a label, to support accessibility for the visual hidden input.
+.md-slide-toggle-label {
+  display: flex;
+  flex: 1;
+
+  cursor: pointer;
+}
+
+// Container for the composition of the slide-toggle / switch indicator.
+.md-slide-toggle-container {
+  cursor: grab;
+  width: $md-slide-toggle-width;
+  height: $md-slide-toggle-height;
+
+  position: relative;
+  user-select: none;
+
+  margin-right: 8px;
+}
+
+// The thumb container is responsible for the dragging functionality.
+// It moves around and holds the actual circle as a thumb.
+.md-slide-toggle-thumb-container {
+  position: absolute;
+  top: $md-slide-toggle-height / 2 - $md-slide-toggle-thumb-size / 2;
+  left: 0;
+  z-index: 1;
+
+  width: $md-slide-toggle-width - $md-slide-toggle-thumb-size;
+
+  transform: translate3d(0, 0, 0);
+
+  transition: $swift-linear;
+  transition-property: transform;
+}
+
+// The thumb will be elevated from the slide-toggle bar.
+// Also the thumb is bound to its parent thumb-container, which manages the movement of the thumb.
+.md-slide-toggle-thumb {
+  position: absolute;
+  margin: 0;
+  left: 0;
+  top: 0;
+
+  height: $md-slide-toggle-thumb-size;
+  width: $md-slide-toggle-thumb-size;
+  border-radius: 50%;
+
+  background-color: md-color($md-background, background);
+  @include md-elevation(1);
+}
+
+// Horizontal bar for the slide-toggle.
+// The slide-toggle bar is shown behind the thumb container.
+.md-slide-toggle-bar {
+  position: absolute;
+  left: 1px;
+  top: $md-slide-toggle-height / 2 - $md-slide-toggle-bar-height / 2;
+
+  width: $md-slide-toggle-width - 2px;
+  height: $md-slide-toggle-bar-height;
+
+  background-color: md-color($md-background, slide-toggle-bar);
+
+  border-radius: 8px;
+}
+
+// The slide toggle shows a visually hidden checkbox inside of the component.
+// This checkbox allows us to take advantage of the browsers support.
+// Like accessibility and keyboard interaction.
+.md-slide-toggle-checkbox {
+  @include md-visually-hidden();
+}
+
+.md-slide-toggle-bar,
+.md-slide-toggle-thumb {
+  transition: $swift-linear;
+  transition-property: background-color;
+  transition-delay: 0.05s;
+}