src: rename namespace as chronochat

Change-Id: Idf390b1b2047c912735014d078ce099cf95026e6
diff --git a/src/main.cpp b/src/main.cpp
index 137dd55..bf2404e 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -42,7 +42,7 @@
 {
   NewApp app(argc, argv);
 
-  chronos::Controller controller;
+  chronochat::Controller controller;
 
   app.setQuitOnLastWindowClosed(false);