better connection and auth failure message

cccli/cli.py

@@ -68,8 +68,9 @@ class Cli(object):
                                         )
             rpcc.start(daemonize=True)
             self.rpc = ConnectionProxy(rpcc)
-        except Exception:
-            raise cliError("Connection failure!")
+        except Exception as e:
+            s = "Connection failure!" if not str(e) else "Connection failure: %s"%str(e)
+            raise cliError(s)
         self.printer.debug("Connected.")
 
     def _auth(self):
@@ -77,8 +78,9 @@ class Cli(object):
         self.printer.debug("Authenticating...")
         try:
             self.rpc.authentify(self.settings["login"], self.settings["pass"])
-        except Exception:
-            raise cliError("Autentification failed!")
+        except Exception as e:
+            s = "Authentication failure!" if not str(e) else "Authentication failure: %s"%str(e)
+            raise cliError(s)
         self.printer.debug("Authenticated.")
 
     def _parse(self):