Introduce support for an H1 Header template in the builder

This commit provides both front and back end templates for handling
the addition of an H1 section to a page when using the builder.

We've decided to use <section><h1>Text</h1></section>, as this
seems to make the most sense semantically on a larger scale. We
tossed around the idea of using a <header> element, but we can't
really make that decision for whoever is building the page.
Document save_header()
Document use of title_save_pre for the title
Adjust the image location and text for the H1 section addition
Add basic inline CSS to shrink the H1 entry box a bit
Merge pull request #50 from washingtonstateuniversity/builder/header

[PR] Introduce support for an H1 Header template in the builder