Fixed bugs for Editor
fix box2d dynamic tree draws
fix some box2d test position
fixed bugs
add background.wav to wp8 to play
add box2dbed test keyboard event.
delete Time of Impact test which can not shown
Merge pull request #6064 from samuele3hu/develop_socket

ccvector_to_luaval would lead to memory leak because call the `retain`
Merge pull request #6065 from boyu0/3.0rc1_test

fix box2dbed dynamic tree test draw.
Merge pull request #6063 from koowolf/add_bg_wav

add background.wav to wp8 to play
fixed logical error in Label::updateFont.
Merge pull request #6052 from pipu/develop_pipu_fixedbugsforeditor_1301

Fixed bugs for Editor
fixed logical error.
fixed logical error in Label::create.
Merge pull request #6067 from Dhilan007/develop_label

1) fixed logical error in Label::updateFont.
2) fixed the font file searching strategy, used FileUtils::isFileExist to check whether the font file exist rather than find . letter.
fixed can't type chinese.
Merge pull request #6069 from Dhilan007/develop_label

fixed can't type chinese.
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-x into develop_socket