Add link to GTM

Author: jjonescz

README.md

@@ -8,7 +8,8 @@ Studio](https://visualstudio.com/).
 
 ## Features
 
-Currently, this plugin only reports your interaction in Visual Studio to GTM and
-shows the time spent on the current file in the status bar:
+Currently, this plugin only reports your interaction in Visual Studio to
+[GTM]((https://github.com/git-time-metric/gtm)) and shows the time spent on the
+current file in the status bar:
 
 ![GTM time in status bar](img/status-bar.png)