initialize m_fSecondsPerframe
Merge pull request #5740 from nutty898/master_nutty_modify_framework_for315

Master nutty modify framework for315
update changelog
change version
[AUTO] : updating submodule reference to latest autogenerated bindings
update changelog
Merge pull request #5746 from CocosRobot/updategeneratedsubmodule_1394679194

[AUTO] : updating submodule reference to latest autogenerated bindings
Merge pull request #5745 from minggo/master-release

Master release