Bump up version to 1.1.1 for release,
Merge options with default values before using,
Add WordPress 3.8 compatibility,
Make screenshots viewable in github readme,
Move changelog info to `HISTORY.md`,
Fix warnings and undefined notices

git-svn-id: https://plugins.svn.wordpress.org/github-ribbon/trunk@850489 b8457f37-d9ea-0310-8a92-e5e31aec5664