Detect Blob create failure in supporting platforms.

Thanks jamesjong for reporting!
Add a test page with iframes
Add a test page for splashscreen.
CB-2331: adding "body" property on FileTransferError object.
2.5.0rc1
[CB-2411] Added a popover repositioning test.

Also added minor camera test documentation.

The "Select Image Using File URI" test will reposition the popover towards the top left corner when the orientation changes.
start of autobench stuff
using uubench for autobenching
Should resolve CB-1478. Added XHR and FileReader benchmarks to autobench.
2.5.0
Merge branch 'next'
CB-2548 Add back button to splash screen test

-Added back button to splash screen test
Support loading platform cordova.js files if available
[CB-2389] Add test for an iframe load after main onload