gitignore in rails_templater-0.2.0

- old
+ new

@@ -3,6 +3,7 @@
 config/database.yml
 config/mongoid.yml
 public/cache/
 public/stylesheets/compiled/
 public/system/*
-tmp/restart.txt
\ No newline at end of file
+tmp/restart.txt
+coverage/