Update compilations controller to use code defined in drsApp to fire downloads.  No longer blocks server the entire time a download is being prepared : )
Moves responsibility for triggering downloads on the download_queue download page to the drsApp object.
Remove extraneous carts/compilations coffeescript files.
Fixes #460. Ensure that we check that element #full_title exists before trying to parse its value into a variable; I'm pretty sure the .val().toLowerCase() call applied to null was throwing a silent error (it definitely errors out on the console).  This seems to fix parse_title terminating all javascript execution on the site.