[AUTO][ci skip]: updating cocos2dx_files.json
Merge pull request #6690 from CocosRobot/update_cocosfiles_1399892708

[AUTO][ci skip]: updating cocos2dx_files.json
Adds travis_mac.yml
Updates travis script to add mac host support
Only build 'merge build'
Merge pull request #6691 from dumganhar/travis-mac-support

mac support for travis ci
Update README.md, add travis build status of mac host
Value: initialize Value with Type::None when its move and copy
contructor is called.
Memory leak fix in `operator =(Value&&)` move assignment.
Merge pull request #6692 from dumganhar/value-copy-or-move-contructor-fix

Value: initialize Value with Type::None when its move and copy contructor is called.
updated winrt shader compiler app to latest version
updated to latest version of cocos2d
fixed for ABSOLUTE and RELATIVE winrt compiler reserved words
updated WP8 precompiled shaders
updated project files to latest version of cocos2d
Merge pull request #6693 from MSOpenTech/wp8-v3-fix2

Fixes for WP8 V3 build recently broken by recent commits