Migrate from Dropzone to jQuery-File-Upload

Dropzone isn't compatible with IE8/9.  Dropzone also
uses jQuery-File-Upload as its base, so let's use the
base instead which supports IE6+.  I wasn't happy
with Dropzone anyway; it would try to pop up too
many of its own UI elements.

To do so, we need to change how file uploads work.
In particular, due to IE sucking so much, we need to
return an HTML response with JSON encoded in it,
and then use the appropriate logic to decode the result.

FileController also updated to handle multiple
concurrent file uploads, and return an object
that has all of the file entries that have
been added.

With this commit, all of the Dropzone elements are now
broken; a future commit will migrate the rest over to
jQuery-File-Upload.

The element that has been converted for testing is
the project_item_view (basically when you use
Project>Edit).  It has been tested in both
Chrome and IE9.

Add HTML5Shiv and Respond.js in the hopes that these
help rendering problems on old IE versions.

This commit partially addresses #130
Fix syntax to be IE8 compliant

Ironically IE8 showed a lot of areas where we were being
sloppy and using variables or ids that may not be
initialized properly.  The biggest offender was the
use of reserved keywords, like `delete`, `create`,
and `class`.

This commit cleans those up, and partially
addresses #130.
Add jquery.file.upload to prod css
Move profile to jquery-file-upload

Migrate from dropzone.  Add formData to the request.
Only use absolute pos on header imgs

Let jquery.file.upload use its styles for everything else.
Explicitly define dependencies
Attachments dropzone > jquery-file-upload

Final piece of the puzzle for #130: move attachments
to jQuery-File-Upload
Remove debugging in FileController

Used a lot of debugging to figure out what IE8/9 is doing.
Remove that since it isn't needed anymore.  Related to #130
Remove testupload in the interest of security

No longer needed; old debugging file.
Use share instead of email

I like the HHS approach of 'sharing' profiles, projects, etc
rather than 'email'.  Change the text to 'share'.