Change CCString* to std::string in wrappers

Change CCString* (deprecated) in std::string in wrappers. Ref #631
Add instruction in V2.2 to V3.2 file

Add instruction in Cocos2d-x V2.2 to V3.2 migration.md to help handle
changement from CCString* to std::string in wrapper.
Ref #631
Fix cocos2d-X ios8 EditBox orientation problem
Change Luminosity minimum to 0.01f

Change luminosity minimum to 0.01f instead of 0.000001f to avoid wiko
to be in no backlight mode.
Fix bug with localPath in loadObjectFromFile
Fix not finding files with isFileExist in assets
Fix tap on animated Image and replaceTexture after animation
Refactor TTSWrapper to use std::vector
Change Image to deal with jpeg
Change vector.at(i) notation to vector[i]
Fix Image::loadAnimation to allow to change animation
Allow to start with last frame when loading an animation
Add POSTFILE operation to HtttpClient
Merge branch 'refactor' into dev