Fix the setup script for osx.

.gitignore

@@ -7,6 +7,7 @@ modules
 *.meta
 game/.import/**
 .sconsign.dblite
+.DS_Store
 
 .vs/*
 .kdev4/*
@@ -20,4 +21,4 @@ game/android/build/*
 #ignore everything in the Engine Directory
 engine/*
 
-*.blend1
+*.blend1

SConstruct

@@ -114,6 +114,9 @@ def copytree(src, dst):
 
             shutil.copytree(sp, dp)
         else:
+            if not os.path.isdir(dst):
+                os.makedirs(dst)
+
             shutil.copy2(sp, dp)
 
 def update_engine():