First pass at replacing live/livequery/delegate/on with on() (admin.js edition)

Lots of changes here, extensive testing needed.

Ensure 'Save Product Files' works as expected in product admin area
Ensure deleting files attached to products works
Completely removed .wpsc-separator function (live query) - pre-3.8 cruft.
Make sure adding/removing new currency layers actually works (I still have no idea what this feature does).
Make sure Limited Stock checkboxes are hidden/shown properly
Make sure Table Rate price checkbox hides/shows properly, and you can add price levels.
Removed 'mass_resize' functionality (Was tied to a debug page that no one uses, with a function on that page that wouldn't make sense for 3.8+)
Removed 40 lines of inline editing code (tied to wpsc_ie_save, which was deprecated in 3.8.9)
Removed more inline editing and shorttag toggling code…pre-3.8.9 and pre-3.8 code, respectively.
Removed Variation UI cruft from the pre-3.8 days.  Also image preview, and several others that were no longer used.

Bottom line?  Admin.js is now 381 lines lighter than before - a savings of 45%.

Todo -
Remove livequery() from inlineeditor(). We have a function that uses live query out of necessity, hooking into pre-fill the quick edit fields.  There's really no way to do this without live query without refactoring how we're doing that entirely, which is outside the scope of this ticket.  For the correct idea of what to do, see http://codex.wordpress.org/Plugin_API/Action_Reference/quick_edit_custom_box

Where I deleted stupidly old code, I also tried to remove the CSS - but frankly - we just need to audit our CSS/JS and figure out what is several year old legacy cruft and kick it to the curb.