Updates on Tutti

Check out the new version of Tutti.
We fixed some bugs and improved other things:
- youtube videos now renders like normal posts, they where still in the old format.
- a bug that prevented some posts to be edited now was fixed.
- the community creation is now improved.
- a random avatar will be used while the user don't provide one of his own.
- pools now can accept multiple choices

Thanks to everyone who sent sugestions.