Update Libwebsockets Libraries to latest version

Had to add some more definitions to the win helpers to get the new LWS
libraries running
Changes to avoid server and client crashes on windows
updated human readable callback reasons for debugging
Merge pull request #17 from novazembla/dev

Latest LWS Library for Windows and some fixes for crashing server/clients on close/exit
Merge pull request #15 from emmanuelgeoffray/master

No need to delete win32 files in linux
Merge branch 'master' of https://github.com/labatrockwell/ofxLibwebsockets into dev
Updated to newest library for OS X. Had to comment out close function in Server.cpp. @novazembla is that going to mess you up?
close() now a pure virtual in Reactor; re-added @novazembla's Server close() method
server should send close notification on close
Merge branch 'dev' of https://github.com/labatrockwell/ofxLibwebsockets into dev
Merge pull request #18 from novazembla/dev

Server should send close notifications to clients on close
Removed some persistent warnings