I think you have have a small misstake in your link to Google+. The rel attribute needs to be separate from the url.
<a href="https://plus.google.com/114149997094688010790?rel=author" target="_blank">Find me on Google+</a>
It should be:
<a href="https://plus.google.com/114149997094688010790/posts" rel="author" target="_blank">Find me on Google+</a>
Update: Never mind, your way seems to be perfectly fine. It's probably just that it takes a while.
It took about a week for my blog to show up in serps with images, but it started with a few new pages per week and took a few months until all pages had images.
One thing that might help is to connect all your pages. An easy way to do that is to add a header link:
<link rel="author" href="https://plus.google.com/u/0/114149997094688010790/posts">