Docs: Updated generated documentation for 5.4.0

Change-Id: I9a99d0c814f3c74eb4414eb633faf5e2a08ef575

Doxygen: Fixed broken link from general revision history to Core(A) h…

…istory.

Added current date for development release 5.2.1-dev3.

Pack: Added release date for 5.2.0

Updated generated documentation for release 5.1.1

CMSIS 5.1.0 online documentation

updating prebuild documentation for 5.0.1

setting pack release version for public 5.0.0

Interim version for seeking feedback from a wider audience.