Updated README
Structs for concept tagging response.
Travis CI.
Test for decoding of concept tagging response.
Changed how the JSON object data is decoded and returned.  Added method for direct access to get the account info.
Added new tests that the API key is sent correctly to Orbit.  Added test for accountinfo method.
Changing Post() args param to be passed as pointer.
Added ConcentTag method.
Updated README.
Add code coverage / coveralls.
Readme fixes.
Merge pull request #1 from JustAdam/master

Unit tests, possibility to decode json into relevant type, new access methods