Now Skip Observer handle event with src_path, dest_path or both
Implemented _is_directory_modified into sync_with_server method
Fixed call to observer.skip method in Daemon.
Before skip was called at the end of sync.
Now we do when operation on file system happened.
Changed the Dictionary name where is contained the default configuration.
Put inside config_file the path of local_dir_state.
Now is more easy to load 2 client in the same machine.
Fixed some bug in manipulation of local_dir_state.
In some case we don't put inside of last_timestamp the right value or we don't cast in int the string where is contained the value.
Changed management of error in client_snapshot manipulation to become more clearly.
Fixed bug response management into Connection manager
Rewrited the management of Connection with server in the sync_with_server
Merge branch 'master' of github.com:corso-python-prato/share-system-team2

Conflicts:
	client/connection_manager.py