Fix acceptance info API to return user_id
Change acceptance info api to return roles accepted or not
Adjust the url sent in the role / license acceptance email

Change the url to <webview.url>/contents/<id>/role-acceptance

MANUAL-UPGRADE: Add "webview.url" to the ini file (e.g. development.ini)
Merge pull request #133 from Connexions/fix-acceptance

Fix roles data in acceptance response