add LKDBHelper
Merge branch 'master' of https://github.com/CocoaPods/Specs
Merge branch 'master' of https://github.com/CocoaPods/Specs
Merge branch 'master' of https://github.com/CocoaPods/Specs
Merge branch 'master' of https://github.com/CocoaPods/Specs
Merge branch 'master' of https://github.com/CocoaPods/Specs
Merge branch 'master' of https://github.com/CocoaPods/Specs
Merge branch 'master' of https://github.com/CocoaPods/Specs
Merge branch 'master' of https://github.com/CocoaPods/Specs
Merge branch 'master' of https://github.com/CocoaPods/Specs
Merge branch 'master' of https://github.com/CocoaPods/Specs
Merge branch 'master' of https://github.com/CocoaPods/Specs
Merge branch 'master' of https://github.com/CocoaPods/Specs
Merge branch 'master' of https://github.com/CocoaPods/Specs
Merge branch 'master' of https://github.com/CocoaPods/Specs
Merge branch 'master' of https://github.com/CocoaPods/Specs
Merge branch 'master' of https://github.com/CocoaPods/Specs
Merge branch 'master' of https://github.com/CocoaPods/Specs
Merge branch 'master' of https://github.com/CocoaPods/Specs
Merge branch 'master' of https://github.com/CocoaPods/Specs