Merge pull request #7 from AntoineAugusti/update-travis

Update .travis.yml due to latest Go version

Merge pull request #6 from AntoineAugusti/get-accessible-features-for…

…-request

Implement endpoint POST features/access

Merge pull request #5 from AntoineAugusti/useless-pointers-and-docume…

…ntation

Do not pass pointers where not needed + documentation

Merge pull request #4 from jimreesman/master

support POST instead of GET for /features/:featureKey/access