modify MSPullRefresh delegate to weak
fix pull refresh header & footer view weak
fix Pull Refresh YARefreshableDirection bug
add DialogView
Merge pull request #1 from mijun/YAUIKit:master

add DialogView
modify YADialogView
Merge pull request #2 from mijun/YAUIKit:master

modify YADialogView
modify YADialogView button corner to 3.f
Merge pull request #3 from mijun/YAUIKit:master

modify YADialogView button corner to 3.f
modify YAPanController animate duration to .5f
refactor YAPlaceHolderTextView IMP
set build only for acive architecture to no
Merge pull request #5 from zoucong/YAUIKit:master

set build only for acive architecture to no
navigation controller: add method for popping to specificed view controller
Merge pull request #6 from lituo/YAUIKit:pop

navigation controller: add method for popping to specificed view controller
add log view hierarchy method for debugging
Merge pull request #4 from lituo/YAUIKit:development

add log view hierarchy method for debugging
UINavigationViewController: insert subview instead of add than bring it to front
Merge pull request #7 from lituo/YAUIKit:development

UINavigationViewController: insert subview instead of add than bring it to front
user NS to instead of UILine & UITextAl