http basic auth + tests
remove username & password from URL before doing request (thanks @hodgestar)
adding note about GitHub OAuth2 access tokens
Merge branch 'feature/issue-279-jsbox-basic-auth-xhr' into develop
Fix docstring for ContactsResource new() api method
Change ContactsResource save() test to ensure old groups are removed
Merge branch 'develop' into feature/issue-270-conversation-lifecycle-improvements
Merge branch 'develop' into feature/issue-270-conversation-lifecycle-improvements