[CB-3039] iOS Exif date length mismtach

- add new macro for appending to tag data
- update date tags to use append macro
[CB-3052] iOS Exif SubIFD offsets incorrect
[CB-3048] Add --arc flag to create script, support arc in template.
[CB-3069] Fix InAppBrowser load events (for non-redirecting pages)

Also adds in some extra logging that is disable by default.
InAppBrowser: Don't inject iframe bridge until necessary.
[CB-3067]: fixing ios5 whitelist of file url
[CB-3066] Fire onNativeReady from JS, as bridge is available immediately
[CB-3067] Revert CDVURLProtocol to not whitelist file urls
Update JS snapshot
Fix FileTransfer unit test. HTTP Method was being set to null.
Add research from CB-2389 as code comments.
Update tagged 2.7.0rc1 cordova-js
Updated VERSION to 2.7.0rc1
Updated RELEASENOTES for 2.7.0rc1
Typo for CORDOVA_2_7_0
[CB-2698] Fix load detection when pages have redirects.