Merge pull request #14 from rednaks/master

Significant changes
Merge pull request #15 from rednaks/master

Coding style issue: fixing indentation
Merge pull request #19 from rednaks/master

Critical bug + repo url
Bug #4:Seulement le master peut inviter le Bot
style fix
Merge pull request #20 from toutouastro/master

style fix
Merge pull request #21 from asmasma21/master

Bug #4: Vérifier qui a lancé l'invitation
Fixing logging : append