Merge pull request #98 from pandamicro/develop

Correctly avoid function<void>
Feature #4916: Upgrade auto bindings generator to v28
Merge pull request #100 from pandamicro/SMv28

Feature #4916: Upgrade auto bindings generator to v28
add more conversional functions
Merge branch 'develop' of git://github.com/cocos2d/bindings-generator into v3_conversions
Merge pull request #101 from samuele3hu/v3_conversions

add more conversional functions
Issue #5021: Update to Cocos2d-x v3 with new conversion settings