rake and xcodeproj can be looser dependencies

There seems to be a conflict between rake and xcodeproj versions in newer cocoapods.

Loosening this dependency to allow later versions to be installed.
Properly escape JSON strings.
Don't use a service, instead boot a static when the app is initialized.
Propagate the activity context to plugins as well.
Don't start first feature until after providing the launch activity.
Merge pull request #50 from cv/patch-1

rake and xcodeproj can be looser dependencies
Pass IOException details to failure callbacks
Fix propagation of errorCode and response for failure callbacks

The failureResponse methods didn't have the right number of paramers,
so weren't propagating all the parts of the exception.
Fix for back button being broken in web apps

It was still referring to the tw.bridge rather than calatrava.bridge
Should solve #58
update calatrava brigde namespace on the spec helper files
Improvements to plugins and event binding on views.
android target as parameter calatrava create prj --android 17
Slight tweak to the arg for Android API version to be a little clearer.
Updating CHANGES.
Fail if coffee script cannot be compiled, rather than quietly moving on to the next step
Include the offending path in the error.
Updating CHANGES.
Giles: Bumping the version number.
Updating to support the safer, newer RVM model.