Transfer xib views in a storyboard for native iOS 7

Also involved cleaning up controllers to make sure they worked in with the storyboard
and used segue to transfer between views.
Fix favourite list for Native iOS 7 implementation

When viewing the property details of an entry in the favourites list, if that
property is un-favourited then the favourite list was not updated after the
back ('< Favourites') button got pressed.
Add property table cell logic into storyboard for native iOS7

Also added a default image to property table cells.

Table views can use prototypes to define layout of cells.
Add delegate to respond to keyboard search button on iOS 7
Update UI for Property Search page on iOS 7

... to make use of storyboard features
Update model to use NSUInteger for iOS 7
Updated Intel App Framework
Intel App Framework runs in local browsers
Added WP8 back support to Intel App Framework
Updated user interface for Intel App Framework

+ 'Enter' / 'Search' keyboard key performs a search on Windows Phone 8
+ Add favicons (favourite icon font) for Android and iOS
+ Fixed navigation bar on all platforms
 + Navigation now present on Android
 + Faves and star button are positioned on the right
 + Replaced heading 'Information' with 'Property Details'
+ Improved navigation between favourites and results
 + Results persisted / cached in memory
+ When no results are present, then taken back to property search page
+ Fixed styling (colour) of recent search result count 'badges'
Use Segoe UI symbol font for WP8 on Intel App framework
Merge pull request #287 from matthewdunsdon/update-intel-app-framework

Update Intel App Framework to use Windows Phone 8 own symbol font / font icons
Merge pull request #286 from matthewdunsdon/ios7-cleanup

Update iOS 7 implementation to take advantage of xcode's storyboard