increment min blender version for io_three

http://wiki.blender.org/index.php/Dev:2.5/Py/Scripts/Guidelines/Addons

The version was previously set to 2.7 instead of 2.70 which would cause not showing a warning when the plugin is enabled for older blender versions.

utils/exporters/blender/addons/io_three/__init__.py

@@ -40,7 +40,7 @@ bl_info = {
     'name': "Three.js Format",
     'author': "repsac, mrdoob, yomotsu, mpk, jpweeks, rkusa, tschw",
     'version': (1, 4, 0),
-    'blender': (2, 7, 3),
+    'blender': (2, 73, 0),
     'location': "File > Export",
     'description': "Export Three.js formatted JSON files.",
     'warning': "Importer not included.",