Update server.c, now it compiles
Add missing callback stubs that prevents linking of the server
Fix pmix.h
Fix value management macroses.
Update client.c
Merge remote-tracking branch 'pmix/master'

Conflicts:
	src/buffer_ops/copy.c
	src/buffer_ops/pack.c
	src/buffer_ops/print.c
	src/buffer_ops/unpack.c