Engine: implement cb_exit callback for plugins#29

Merged

edsiper merged 2 commits intofluent:masterfrom pandax381:pr_pre_exit

Sep 2, 2015

Commits on Aug 28, 2015

Engine: implement pre_exit callback for plugins
pandax381
committed

Commits on Sep 2, 2015

Engine: rename cb_pre_exit to cb_exit
pandax381
committed