Merge branch '2.4dev' of github.com:plfs/plfs-core into 2.4dev

Conflicts:
	man/man5/plfsrc.5in
Merge branch 'cmake' of github.com:thewacokid/plfs-core into 2.4dev
added something about auto_cache
Merge pull request #223 from johnbent/2.4dev

added something about auto_cache
Merge branch 'cmake' of github.com:thewacokid/plfs-core into 2.4dev
Merge branch '2.4dev' of github.com:plfs/plfs-core into 2.4dev
Updated build process, updated documentation for cmake, cleaned up
FindYAMLCPP.cmake script to use YAMLCPP_ROOTDIR for discovery
Removed erroneous flag
Added clarifcation of build process