ajoute l'option m (media) a la soumission d'un lien dans la RP

ajoute l'option m (media) a la soumission d'un lien dans la RP

Truncate was too violent since twitter modify link length; Unicode for joining utf-8 string was not ok

Stop annoying people trying to explain how wantzel works: everyone can now say ~rp without wantzel spam chan.

Fixing description of admin commands; plus moving the resolution of 'admin timer' command in the appropriate way

Issue #5: wantzel can understand both '!' and '~' as a starting command. Should remove the '!' later, a message is displayed to help users

Revert "Issue #5: wantzel can understand both '!' and '~' as a starting command. Should remove the '!' later."

This reverts commit 683e6fda.

Issue #5: wantzel can understand both '!' and '~' as a starting command. Should remove the '!' later.