Use native iOS lib

[radeva]

• Use 3d party native lib for iOS instead of the custom implementation.

• Get rid of the RadListView dependency

Native libs: https://stackoverflow.com/questions/20756899/how-to-select-multiple-images-from-uiimagepickercontroller

[tbozhikov]

Acceptance criteria:

• selected image in the album should look like the native iOS selected image
• demo app should show single and multiple selection features
• android should remain the same (native looks, working)
• when selecting single in iOS, directly choose this image Automatically select image on tap #163
• [optional] slide and drag to select images Feature Request: Slide and Drag to select images #143