Merge pull request #5090 from martell/emscripten

closed #3749: Add emscripten support for Windows Host
Update CHANGELOG [ci skip]
Update AUTHORS [ci skip]
close #3754:The lua's binding of the CCComponent class and the releated functions were missing
Merge pull request #5112 from samuele3hu/masterFix

close #3754:The lua's binding of the CCComponent class and the releated functions were missing
Update CHANGELOG [ci skip]
added missing asset png files
Merge pull request #5192 from MSOpenTech/wp8-assets

added missing asset png files
Added libcurl support for winRT and wp8
updated curl and winrtsocket
Got Curl fully integrated with WP8