Begining of new feature : Page displaying information about OWSContext

Signed-off-by: Mario <mariojothy@gmail.com>
Refactorisation of the MapCatalog Maven project :
-exceptions are now thrown
-Input streams are redefined to prevent double usage

Signed-off-by: Mario <mariojothy@gmail.com>
-Followup in play for the last changes and refactoring of Maven project.
-Cleared the way errors and information messages are implemented