impletation of server.request + creation of new exception bad request
Merge pull request #3 from Mendroyxx/master

Adding a test in the main function of the server.
Merge branch 'master' of https://github.com/nicolasdavid/tchat.git
impletation of server.request + creation of new exception bad request + fix merges
Correction of the test (adding 'System.out.println()').