feat(chat) - Add fullpage tchat.

Create new page to show chat.
Fullpage show full chat (not mobile mode).

Feedback 89. https://trello.com/c/RVlMS9s9
feat(chat) - Add fullpage tchat.

Rename "Messagerie" menu to "Communiquer".
Add tchat link

Feedback 89. https://trello.com/c/RVlMS9s9
Merge pull request #69 from Armaklan/tchat-page

Tchat page