Initial directory structure.
...getting started...
Added fields for Asset resource based on documentation
added assertions, placeholders for exception handling in urlopen calls.  Filled out call to Asset constructor with basics, though they currently don't match what's coming back from the API
Added additional fields
Added additional fields
Removed __version__ var
Added create_drop(), rearranged order of some methods
Removed "SubAsset" subclass, updated Asset's __str__ method
Added create_link method.  Updated web service calls to use api.drop.io instead of drop.io.
Added Link class
Added map_drop and map_asset private methods.
Switched constructors from using named parameters to more generic **kwargs
look for json (2.6+) before defaulting to simplejson
Added create_file method (adds dependency on pycurl)
Updated urllib2 usage to pycurl
Removed extraneous instance fields, and cast url params as strings prior to passing to pycurl
Added stubs for remaining methods
Switched create_link to use dropio.resource.Link, created __map_link wrapper