Changes package.json to add contributors and fix other URLs
Changes package.json to add contributors and fix other URLs

eneuhauser/ember-json-api,andrewbranch/ember-json-api,kurko/ember-json-api,Asgaroth/ember-json-api,eneuhauser/ember-json-api,Asgaroth/ember-json-api,NichenLg/ember-json-api,plyfe/ember-json-api,andrewbranch/ember-json-api,mirego/ember-json-api,mirego/ember-json-api,NichenLg/ember-json-api,kurko/ember-json-api