removed newuser endpoint: lib, tests, docs ; fix and close gentlero#10

Author: vimishor

docs/Home.md

@@ -9,7 +9,6 @@ A simple PHP wrapper for Bitbucket API.
 * [Groups](groups.md)
 * [Group privileges](group-privileges.md)
 * [Invitations](invitations.md)
-* [Newuser](newuser.md)
 * [Privileges](privileges.md)
 * [Repositories](repositories.md)
     * [Changesets](repositories/changesets.md)