Added wrapper for add_aray function.
Added wrapper for dgeocomps (no tests)
Added wrapper for meanomega (no tests)
Added wrapper for smooth (no tests)
Added wrapper for add_by_cnst
Added wrapper for div_aray
DOC: minor documentation edits on awips functions
MAINT: changed nx and ny parameters of dgeocomps to be optional.
Merge pull request #16 from jjhelmus/master

Added wrappers for additional functions