- More consistent use of "AMDGPU Stack"
- Add note about ROCm
- Updates to amdgpu-install (interface changes, no "./")
- Remove references to the "tar" and replace with the installer package
- Add explaination of new --vulkan option
- Replace "variant" with "use case"
- Replace "pro" with "workstation" in regards to opengl or use case
- Drop mention of "pro" opencl
- Add notes about EULA acceptance
- Drop obsolete information
- Minor improvements and changes

Change-Id: Ia840056527a791507620b268f7ca87422d4e5040
Signed-off-by: Jeremy Newton <Jeremy.Newton@amd.com>