Update README.md

Update README.md

Merge remote-tracking branch 'origin/master'

Update README.md

Fix spelling of 'cross platform' to 'cross-platform'

Corrected spelling of 'cross platform' to 'cross-platform' in the README.

Update README.md

Update README.md

Clean up links section in README.md

Removed several links from the README.

changing CMAKE_SOURCE_DIR to CMAKE_CURRENT_SOURCE_DIR for Windows Ope…

…nCL builds

yet another warning fix