When saving entries, any images in the summary or content are given the "img-thumbnail" class, replacing any previous CSS class.

This bootstrap class displays a subtle border around images, which makes for prettier images when reading.
Move feed title a bit to the right.
Updated Bootstrap to 3.0.2.
Images in entry summaries and contents are prettier.

We add a top and bottom margin, and the (recently added) bootstrap "content-block" CSS class.
Updated Rails to 4.0.1