Update Version number to 1.8

Noted IndexedDB

Update Version number to 1.8

version fix on demo

Correct Version number in demo script

Update to ensure all console outputs require debug

Reorder the output params

This will make it easier to use with callbacks, since most applications
will not require a storage prefix beyond the config setting.

Remove specific URLs from the cache

Bug Fix: xhr totalSize not always set

totalSize not always set so we should only throw errors if there was
nothing to process.

Added 3 callbacks for the win

Three callbacks based on the jQuery.ajax() function
-always
-done
-fail