-Added EXR supprot for HDR (no BC6 compression yet though)

-Improvements to texture importer
-Proper detection of S3TC compression modes, and added all modes to Image
-Fixes to non-power of 2 compressed textures, which should all be supported by GLES3

modules/tinyexr/config.py

@@ -0,0 +1,7 @@
+
+def can_build(platform):
+    return True
+
+
+def configure(env):
+    pass