Label:fixed text display incorrect when come to foreground on android.
label:fixed getter for font size and font name.
Updates VS project to fix compilation errors when building in Release mode.
Some warning fixes.
Merge pull request #5788 from Dhilan007/develop_label

Label:fixed text display incorrect when come to foreground on android.
Merge pull request #5790 from dumganhar/warning-fix-and-project-update

Warning fix and update VS project to fix compilation errors when building in Release mode
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-x into develop_new_fix