Adds UIKit.h to prevent possible compilation error

Got an undeclared identifier UIDevice in one of my projects. Adding the import prevents the possible error.
Removed StorefrontInfo and arranged code in 'data'
fixed project file
Merge pull request #18 from NatWeiss/patch-1

Adds UIKit.h to prevent possible compilation error
Added refreshMarketItemsDetails which refreshes prices for purchsable items that exist in the market
Merge branch 'master' of github.com:soomla/ios-store

* 'master' of github.com:soomla/ios-store:
  Adds UIKit.h to prevent possible compilation error
Update README.md
Update README.md
Added the receipt of a successful purchase to EVENT_APPSTORE_PURCHASED's userInfo
Merge branch 'master' of github.com:soomla/ios-store

* 'master' of github.com:soomla/ios-store:
  Update README.md
  Update README.md
Added an option to 'refreshInventory' using StoreController. It'll do both restore-transactions and items-details-refresh.
Fixed naming of events and objects to match all SOOMLA plugins
Added the changed market items to the MarketItemsRefreshed event
Added the changed market items to the MarketItemsRefreshed event
Fixed function name
Added missing event
Clarify when products are not found

If the user has not created any products on the iTunes Store, the existing `refreshMarketItemsDetails` will silently fail to initialize any purchasable products.

This pull request makes it clear when products IDs cannot be retrieved from the iTunes Store.
Merge pull request #21 from NatWeiss/patch-2

Clarify when products are not found.

Thanks @NatWeiss
Added build phase to create multiple platform static lib
Merge branch 'master' of github.com:soomla/ios-store

* 'master' of github.com:soomla/ios-store:
  Clarify when products are not found