Added count property that reflect actual asset count

Change-Id: I7a377ff53592200ba916b22319c6ca5c35cddea7

Replace usage of protocol class to AnyObject

layout bugfix

Bugfix

v2.1.6

Fix iphone12 layout issue

Merge pull request #290 from 5stralia/master

Check canSelect(phAsset:)

fixed #288

Merge pull request #287 from tilltue/spm

SPM Support