* Refactors WebSocket:
1. Supports wss protocol
2. Uses only one libwebsockets context, multiple wsi instances to avoid multi-thread issues
3. Uses lws_create_vhost to create multiple virtual host, different protocols works
* Adds openssl include path to xcode project configuration.
* mac doesn’t depend on curl
* ca file path should be full path.
* More bug fixes like which in https://github.com/cocos2d/cocos2d-x/pull/6986
* Remove curl dependence for mac
* Updates Andorid.mk
* [win32] Adds wss support for win32, and updates openssl, libcurl, libwebsockets libraries.
* Updates external/config.json to 118.
* [win32] Updates cocos/2d/libcocos2d.vcxproj to fix compilation error while building in release mode.
* Linux support websocket ssl connection.
* Updates external/config.json
* Updates install-deps-linux.sh
* Adds dependence of binutils, print ld version
* Updates travis scripts.
* Updates travis scripts.
* Updates travis script, don’t output log while extracting.
* update before-install.sh
* updates before-install.sh
* updates before-install.sh
* don’t output log for installing software.
* Updates config.json to 120.
James Chen