Added 'encoding' package in py2exe options

The change introduced by commit d38ec39 broke Windows builds since py2exe didn't include the 'encodings' package. 
Refer: http://www.py2exe.org/index.cgi/EncodingsAgain

setup.py

@@ -88,6 +88,8 @@ def patch_nsi_template():
     sys.exit(-1)
 
 excludes = get_excludes()
+includes = ["encodings",
+            "encodings.*",]
 
 setup(
     name = 'Dtella',
@@ -102,6 +104,7 @@ def patch_nsi_template():
             "ascii": True,
             "dll_excludes": ["libeay32.dll"],
             "excludes": excludes,
+            "includes": includes,
         },
 
         "py2app": {