Add the read_file method on the sc2reader package.

Now the interface is again consistent with the class interface.

Author: GraylinKim

sc2reader/__init__.py

@@ -167,6 +167,9 @@ def read_file(self, file, **options):
 """
 __defaultReader = Reader()
 
+def read_file(location, **user_options):
+    return __defaultReader.read_file(location, **user_options)
+
 def read(location, **user_options):
     return __defaultReader.read(location, **user_options)