Implement needed routes of ARSnova Backend in frag.jetzt

Implement analyzed routes in #10 (closed)

Entities:

• Room

• Comment

• UserProfile

• GET /{entity}/{id}

• PUT /{entity}/{id}

• POST /{entity}

• PATCH /{entity}/{id}

• DELETE /{entity}/{id}

• POST /{entity}/find

Room:

• GET /room/moderator -> /room/{roomid}/moderators
• PUT /room/moderator/{userId} -> /room/{roomid}/moderator/{userId}
• DELETE /room/moderator/{userId} -> /room/{roomid}/moderator/{userId}

Userprofile:

• POST /user/register
• POST /user/activate
• POST /user/resetpassword
• POST /user/roomHistory

Authentication:

• POST /auth/login
• POST /auth/login/guest
• POST /auth/login/{providerId}