updated submodule MPQExtractor as requested in #26 and #27

if you never inited the module you are fine. If you did, you have to
 * git submodule deinit -f includes/tools/MPQExtractor
 * rm -rf .git/modules/includes/tools/MPQExtractor
 * git submodule sync
 * git submodule update --init --recursive --remote
or something among those lines (good lord..)

.gitmodules

@@ -1,6 +1,6 @@
 [submodule "includes/tools/MPQExtractor"]
 	path = includes/tools/MPQExtractor
-	url = https://github.com/iamcal/MPQExtractor.git
+	url = https://github.com/Kanma/MPQExtractor.git
 [submodule "includes/tools/BLPConverter"]
 	path = includes/tools/BLPConverter
 	url = https://github.com/Kanma/BLPConverter.git