Update README.md
Update README.md
add todo tag for unimpmeneted feature
Update README.md
now text in image tag can be any length but it will be ignored
fix #35, if image path starts with '/', it will be treated like an external image
start to add network code, copied some old code from somewhere
refine CCByteBuffer
refine CCWorldPacket
remove CCWorldPacket
split out CCTCPSocketManager
remove c++11 std::bind
tidy up CCTCPSocket
rename CCTCPSocketManager to CCTCPSocketHub, tidy it up
tcp socket connected to echo server, debug ok
fix android compile
update comment
tidy up CCNetworkCommon.h
add python server code
update demo