Add api version header to Accept header

This will enable us to differentiate this version of the client when
proper API versioning is added server side.
Add test for api versioning header
Wrap long lines, Travis
Bump version
Align hash literal elements, Travis
Learn some more interesting test fail dialog, Travis
Merge pull request #76 from SUSE/review_140516_add_api_preversioning_header

Add api version header to Accept header