Removed out of date VulkanSDK download and unpack instructions

INSTALL.md

@@ -28,10 +28,10 @@
 
 ### Installing dependencies
 
-* Ubuntu:  
-	`sudo apt-get install cmake-curses-gui g++ git libvulkan-dev`
+* Ubuntu:
+	`sudo apt-get install cmake-curses-gui g++ git libvulkan-dev glslang-dev glslang-tools
 
-* Gentoo:  
+* Gentoo:
 	`emerge dev-util/vulkan-tools`
 
 ### Build
@@ -207,7 +207,7 @@ For example, a bare minimum CMakeLists.txt file adding the mentioned cmake targe
 
 ### Using VSG provided cmake macro to generate cmake support files
 
-Projects that install a library must generate some cmake-related files so that the library can be found by ```find_package()```. To simplify the generation of these files, the cmake macro ```vsg_add_cmake_support_files()``` has been added. 
+Projects that install a library must generate some cmake-related files so that the library can be found by ```find_package()```. To simplify the generation of these files, the cmake macro ```vsg_add_cmake_support_files()``` has been added.
 
 In addition to calling the macro, it requires a template for creating the xxxConfig.cmake file, as given in the following example:
 
@@ -323,7 +323,7 @@ So now we're ready to build VSG. With the SDK installed this is very similar to
 	git clone https://github.com/vsg-dev/VulkanSceneGraph.git
 	cd VulkanSceneGraph
 	cmake . -G "Xcode"
-	
+
 Once CMake has finished you can open the generated Xcode project and build the 'install' target. This will build VSG and install the headers and generated library onto your machine.
 
 Again, as with other platforms it's useful to now set your CMAKE_PREFIX_PATH to point to the VSG library we have just installed. If you've installed to the default location you can add the following to your .bash_profile file.

README.md

@@ -45,16 +45,7 @@ Community projects:
 
 The above dependency versions are known to work so they've been set as the current minimum, it may be possible to build against older versions.  If you find success with older versions let us know and we can update the version info.
 
-Download VulkanSDK from [LunarG](https://vulkan.lunarg.com/sdk/home), unpack into local directory and set VULKAN_SDK environment variable to the include/lib directory within it. For Linux it would typically be along the lines of:
-
-    export VULKAN_SDK_VERSION=1.2.162.1
-    export VULKAN_SDK=${PWD}/VulkanSDK/${VULKAN_SDK_VERSION}/x86_64
-
-    mkdir VulkanSDK
-    wget https://sdk.lunarg.com/sdk/download/${VULKAN_SDK_VERSION}/linux/vulkansdk-linux-x86_64-${VULKAN_SDK_VERSION}.tar.gz -O VulkanSDK/vulkansdk-linux-x86_64-${VULKAN_SDK_VERSION}.tar.gz
-    tar zxf VulkanSDK/vulkansdk-linux-x86_64-${VULKAN_SDK_VERSION}.tar.gz -C VulkanSDK/
-
-Once you've downloaded and unpacked the VulkanSDK you'll want to put VULKAN_SDK into your user environment variable setup so that CMake's find_package(Vulkan) can find the VulkanSDK's location.
+While you can install Vulkan and glslang development libraries and headers from 3rd party repositoriesm these may be older, so for the latest versions you can also use the VulkanSDK provided by LunarG.  Your can download VulkanSDK from [LunarG](https://vulkan.lunarg.com/sdk/home), unpack into a local directory and set VULKAN_SDK environment variable to the include/lib directory within it.
 
 ### Command line build instructions:
 
@@ -63,7 +54,6 @@ To build and install the static libvsg library (.a/.lib) in source:
     git clone https://github.com/vsg-dev/VulkanSceneGraph.git
     cd VulkanSceneGraph
     cmake .
-    make -j 8
-    sudo make install
+    cmake --build . -j 16 -t install
 
 Full details on how to build the VSG (Unix/Windows/Android/macOS) can be found in the [INSTALL.md](INSTALL.md) file.