Simplify run token generation.

git-svn-id: https://plugins.svn.wordpress.org/wp-geshi-highlight/trunk@918664 b8457f37-d9ea-0310-8a92-e5e31aec5664
Remove obsolete screenshot from repository.

git-svn-id: https://plugins.svn.wordpress.org/wp-geshi-highlight/trunk@918666 b8457f37-d9ea-0310-8a92-e5e31aec5664