Merge branch 'release/0.1.0' into develop
minor changes
updated ReactiveCocoa
updated ZLJCommons and switched to ZLJCommons logging macros
minor changes to notification observer
Merge branch 'master' into develop
updated ZLJCommons
introduced wrapper for weak reference (used for collections)
updated ALAssetsGroup category to work without ReactiveCocoa
added some tests and improved source code
updated ALAssetsLibrary category to work without ReactiveCocoa
introduced ALAssetsLibrary singleton method
corrected some errors in test cases
introduced library header file
updated pods to only include ReactiveCocoa for test target
updated podspec
Merge branch 'release/0.2.0'