Delete old Test files
Add fix of Shirioko https://github.com/venomous0x/WhatsAPI/commit/dccfb1c2e1c8519b01b3487ce727339002a1831e

I was forgotten the level of access for one variable and function
Add the last fix of shirioko https://github.com/venomous0x/WhatsAPI/commit/dccfb1c2e1c8519b01b3487ce727339002a1831e

SendSync returns message ID
- Plus some accessor changes