Deals with #825 and enables reloading image layers#912

Open

HenryJia wants to merge 2 commits intomapeditor:masterfrom HenryJia:ImageLayerReload-#825

+379-9

Commits on Apr 3, 2015

Enables auto reloading of image layers upon image changes. Encounters SIGABRT on line 52 of imagelayermanager.cpp on close of Tiled.
Henry Jia
committed
Fixes the error in the previous commit and adds the 2 files which I forgot to add in the last commit.
Henry Jia
committed