Edit deleteUser/getChannels & the messages functions (#2)

* Modifying the messages functions

- Edited the deleteMessage function.
- Replace $data[2] by $data[5] cf: users.csv
- Removed the "admins" rights for "acs-dds" user.
- Changed the resetMessages function since apache send me errors about
it.
- Added a new "notification": "Soon"

* Changed the getChannels function

Upgrated the old-school function for the getChannels function to a new
one in POO.

* Edit deleteUser/getChannels

+ Initialize new object "Controller"
+ Trim the username sent by post.

* Replace the old getChannels function by the new one, in POO

v2.0.2

modification du css, ajouts de labels personnalisés pour la db users et
dispatchement des fonctions dans leur classes respectives.

v2

v1.1

Create a Chat in AJAX & PHP