ThywinLib exceptions added

Added: exceptions handling
Removed: unnecessary printf
ThywinLib typedef added

Added typedef for DocumentPacket and URIPacket
ThywinLib updated

Added: constructor for ThywinPacket, function checkRecv()
Updated: exception handling, typedefs
implemented: constructor for ThywinPacket in Communicator
ThywinLib default constructor added
Merge pull request #7 from Thywin/ThywinLib

Pull request accepted.