Added ordered properties
Added message.pack method
Redefined property packing for more flexibility
Property.format is no longer static
Moved old messages into tempory file
Beginning to reimplement messages
Removed irrelevant _format property of Message classes
Added some messages
AuthResponseInp_PI proof of concept
Fixed array property
Fixed submessage property
Added unpacking
Fixed array and submessage unpacking
Renamed test
Added unit test file
Added test for startuppack
Binary property now properly performs base64 encoding and decoding
Added test for inxivalpair
Added test for key value pair
Added message init method for convenience