Fix sortable.

Previously it was changed to POST all items with automatic positions from 0 to 49.
I have reverted to use GET with from & to by default.

You could use data-post-all to use the POST behavior.

Also the changes to the unminified JS were not committed.

The unminified JS is now committed, converted to tabs and minified with UglifyJS.
Merge pull request #23 from OpenBuildings/sortable

Fix sortable.