Merge pull request #266 from matthewdunsdon/release-preparation-v1.4

Release preparation v1.4
Minor typo fix
Fixed Titanium for iOS 7

As part of the SDK change in Titanium, the following function was removed
`Titanium.UI.iPhone.createNavigationGroup`.
Updated Titanium project info and assets
Updated Titanium to use Action Bar in Android

As part of moving to Android 4.0 (v14) devices no longer needed to provide
menu buttons.  The design language implies that the Action bar should be
used to provide the 'favourite' navigation / setting functionality - which
is how other PropertyCross implementations has solved thiS.
Modified Titanium UI layout

Layout changed to mimic the NeoMAD implementation:

 * Search results and favourites lists are thiner, with smaller images
 * Property view title updated and image has additional indentation
Prepared new Titanium release

Updated build version and carried out minor code cleanup.
Merge pull request #267 from matthewdunsdon/titanium-support-ios-7-and-android-4_0

Updated Titanium for iOS 7 and Android 4 0
Updated Xamarin assets