ADD: Condition Stubgenerator compilation
added contributions to authors.txt
added reference projects
added further references
Don't free memory you didn't have allocated yourself.
fix installation of headers
ADD: SocketClient/SocketServer connectors

 - By default SocketServer and SocketClient use TCP
 - SocketServer can handle several connections at a time
 - CMake variable to enable/disable feature (SOCKET_CONNECTOR)
 - Update Travis config to test SOCKET configuration
ADD: Windows support using native threads and WinSock