Merge pull request #3 from yacinebenfaid/update_add_link

add link
Merge pull request #4 from yacinebenfaid/update_add_link

bug fix
addLink throws en exception when the route doesn't exist
Merge pull request #5 from kimlai/addLink_not_found_handling

addLink throws en exception when the route doesn't exist
Merge pull request #1 from yacinebenfaid/master

Refacto api Resource
Cleaned up licensing info
Fixed compat with nocarrier/hal v0.9.4
add link