Minor fix in Window and OpenGL examples
Improved the performances of Window::getSize() (the size is now cached)
Fixed IDE folder of example "Cococa"
On Unix systems, a socket disconnection no longer stops the program with signal SIGPIPE (#72)
Fixed TCP packet data corruption in non-blocking mode (#402, #119)
Attempt to fix taskbar bugs on Windows (#328, #69)
Minor improvements to sf::Packet operators (now using strlen and wcslen instead of explicit loops) (#118)