added coordinate systems code, depends on pyproj
added coordinate systems code, depends on pyproj

git-svn-id: acf0ef94bfce630b1a882387fc03ab8593ec6522@299 150532fb-1d5b-0410-a8ab-efec50f980d4

ShawnMurd/MetPy,jrleeman/MetPy,dopplershift/MetPy,Unidata/MetPy,ahaberlie/MetPy,Unidata/MetPy,dopplershift/MetPy,deeplycloudy/MetPy,jrleeman/MetPy,ahill818/MetPy,ahaberlie/MetPy