Efficient library implementation of broadcast
Fix for cases where valid lvalues were not being computed.
Merge pull request #488 from dbabokin/broadcast_library

Efficient library implementation of broadcast
Merge pull request #489 from jbrodman/gacteon

Fix for cases where valid lvalues were not being computed.
knc.h cleanup
Merge pull request #495 from jbrodman/master

knc.h cleanup