Fix and bulletproof osx packaging script; cleanup some obsolete .gitignore entries

.gitignore

@@ -12,20 +12,11 @@ mods/*/*.dll
 # Red Alert binary files
 mods/*/packages/*.[mM][iI][xX]
 
-# Crap generated by OpenRa
-sheet-*.png
-log.txt
-
-*.rep
-
 #binary stuff
 /*.dll
 *.pdb
 *.mdb
 *.exe
-OpenRA
-OpenRA.app
-*.vqa
 
 # backup files by various editors
 *~
@@ -33,10 +24,8 @@ OpenRA.app
 # dependency DLLs (different for every platform!)
 cg.dll
 cgGL.dll
-glfw.dll
 
 /OpenRa.Gl.dll
-settings.ini
 
 #monodevelop
 *.pidb