Update README.md
Update README.md

typos
Merge branch 'master' of github.com:konopka/cocos2dx-store into konopka-master

* 'master' of github.com:konopka/cocos2dx-store:
  Fix android compilation issue See discussion: http://answers.soom.la/t/closed-soomla-store-cocos2d-x-android-error/360/19
Merge branch 'konopka-master'

* konopka-master:
  Fix android compilation issue See discussion: http://answers.soom.la/t/closed-soomla-store-cocos2d-x-android-error/360/19
WIP moving store logic into Cocos2dX level, storages, all domain objects (compiles)
WIP finishing up with domain objects
WIP StoreInfo implementation
WIP StoreInventory implemented
WIP all cocos2dx code done
WIP bridges done, ready for testing
fixing simple issues + updating fromSources project
WIP more fixes to store code + iOS seems to be working
WIP Android works now
adding Mac targets to projects + fixing inEditor bugs
updating simple handler
updating submodules
Merge branch 'inEditor'

* inEditor:
  updating submodules
  updating simple handler
  adding Mac targets to projects + fixing inEditor bugs
  WIP Android works now
  WIP more fixes to store code + iOS seems to be working
  fixing simple issues + updating fromSources project
  WIP bridges done, ready for testing
  WIP all cocos2dx code done
  WIP StoreInventory implemented
  WIP StoreInfo implementation
  WIP finishing up with domain objects
  WIP moving store logic into Cocos2dX level, storages, all domain objects (compiles)
updating README + adding changelog
updating changlog
adding documentation + exposing refreshMarketItemsDetails for all platforms