Changed 'path' to 'file' for help text being loaded from a local file.
Also added logic to catch plain text files and wrap them in  <pre> to preserve formatting
Removed old, commented-out, and no longer used method addPrimaryFields()
Fixed a few minor bugs related to callbacks
Few bug fixes with modal boxes using URL as the source
Added todo marking why we aren't minifing JavaScript
(The library we are using uses ob_start, which doesn't work inside engine's template handler)
Switched modal library from leanModal to colorbox
This is because leanModal was not working for iFrame content, only inline content