standardized formatting for CLI Examples in docstrings
updated existing functions to include more options:

available_version
stats
install
delete
info
upgrade
added seven new functions to pkgng module:

clean
autoremove
check
which
search
fetch
updating
Merge branch 'freebsd' of github.com:cedwards/salt into freebsd
minor fix to .format(reponame) where needed
Merge pull request #3362 from cedwards/freebsd

updates to pkgng module