* gimptool.in: added --install-bin options for installing already built plugins

* app/convolve.c: check for indexed images properly

* app/layer.c: fix tile refcount oversight

* app/text_tool.c: fix for unlikely memleak

* libgimp/gimpimage.c: stupid ytpo ;)

* plug-ins/gfli/gfli.c: applied gimp-wh-980507-0 to fix "chunk-type-7-bug"

-Yosh