Use the recommended CocoaPods practice of automatically specifying th…

…e tag.

Version 1.8.1

Fix include of NSObject+A2DynamicDelegate.h.

Signed-off-by: Zachary Waldowski <zwaldowski@gmail.com>

Tag BlocksKit 1.5.2.

Signed-off-by: Zachary Waldowski <zwaldowski@gmail.com>

Pod spec update. BlocksKit 1.5.1.

Signed-off-by: Zachary Waldowski <zwaldowski@gmail.com>