Add build discarding option for Jenkins

Fixed build number reference for release

Fixed README links to x64 Linux pre-pacakged binaries

update version, changelog for release

Updates version numbers in source in preparation for release

Public release MSCL 64.2.2

Public release MSCL 63.1.0

Public release MSCL 62.1.2

public release of MSCL 62.0.0

Public release MSCL 61.1.6