Added pragma marks
Defined constants DEFAULT_UPDATE_INTERVAL & EVENT_SEND_THRESHOLD
Improved namespacing by adding Countly prefix to DeviceInfo, EventQueue & ConnectionQueue
Adopted Allman style indentation
Improved thread safety of singletons by using dispatch_once
Simplified GTMNSStringURLArgumentsAdditions category as Helper Functions
Added CountlyDeviceInfo method definitions
Improved metrics method by using dictionary and serialization
Improved events method by using dictionary and serialization
Fixed integer warnings
Cleared useless @synthesize directives
Replaced some instance variables with properties
Fixed managedObjectContext accessors
Used new literals to create NSNumbers
Fixed memory leaks