Fixing typo
Normalize FileConn namespace
Adding a FileMsg class.

This class will be used to communicate with the client.
The available commands are descrived at File_Message_Operation.

All commands will be sent in a string form using XML syntax.
So as an example, if the user wants to rever a file the message
will be the following:

<command>4</command><file>*FILE_NAME_GOES_HERE*</file>.