curl dependencies

@cthrax @gitnik @aesnyder @kandizzy @zacronos 
curl.json 
- curl dependencies via grunt-curl to behave "like" bower 
- intended for all files that bower and npm can not support , like svn lib 
- deleted all google maps util files to use curl.json instead. 
This allows for a more confident path for getting updates from gmap-tools and knowing we didnt muck with the code directly. 

keydragzoom 
- added to curl.json - this is in preperation for a keydraggzoom directive
Patch is handled in extensions.coffee