At this point, I have only 2 fails in the Node build, but I'm doing a
bunch of manual stuff locally and still have a bunch of hacks.

The idea is that the environment wraps up the mutable stuff in
Handlebars (like the helpers) and that you could theoretically create a
new one at any time and pass it in to Handlebars.template.

Every test makes a new environment and uses it in template compilation.

The basic strategy is that there will be a global Handlebars object for
the browser build, and that object will have a `compile` on it which
uses its environment in the compiler.

It will also be possible to glue things together manually by using the
AMD build and passing the environment to `compile` directly. Some of
these details are TBD.

Conflicts:
	dist/handlebars.js

Conflicts:
	dist/handlebars.js
	dist/handlebars.runtime.js
	lib/handlebars/base.js
	lib/handlebars/utils.js

Conflicts:
	Gruntfile.js
	Rakefile
	dist/handlebars.js
	dist/handlebars.runtime.js
	lib/handlebars.js
	lib/handlebars/base.js
	lib/handlebars/runtime.js
	lib/handlebars/utils.js
	package.json

fixing jshint errors

Second change required to work around multiple traceur loading issue.