Modify API.get to return timestamps, and the mock api result generator to return them (BREAKS TESTS)
Fix broken tests for API.get
Include current time and expiry in APIErrors
Update Account to pass through timestamps
Update Char to pass through timestamps
Update Corp to pass through timestamps
Update EVE to pass through timestamps
Update Map to pass through timestamps
Update Server to pass through timestamps
Update shared parsing tests to ignore new timestamps
Update requests tests for new timestamps
Update README.md to reflect additional return values
Make API.get return an APIResult namedtuple
Update wrapper functions to return api.APIResult namedtuples
Update README.md to deal with APIResult namedtuples
Fix consistency of return statements
Make the APIError fields more consistently named
Merge pull request #139 from ayust/expose_timestamps

Provide the timestamps from EVE API calls to callers of EVELink APIs.

(BREAKS BACKWARDS COMPATIBILITY.)