added link to wiki

Author: colinta

README.md

@@ -46,3 +46,10 @@ The rest of the commands are not bound by default:
 `file_diff_file`: Shows the diff of the current file or selection(s) and a file that is in the current project.
 
 `file_diff_tab`: Shows the diff of the current file or selection(s) and an open file (aka a file that has a tab).
+
+Help!
+-----
+
+Check the [wiki][] for more tips
+
+[wiki]: https://github.com/colinta/SublimeFileDiffs/wiki