Moved django-wiki submodule to be a pip install from git.

.gitmodules

 [submodule "askbot"]
 	path = askbot
 	url = git@github.com:MITx/askbot-devel.git
-[submodule "lms/djangoapps/django-wiki"]
-	path = lms/djangoapps/django-wiki
-	url = git@github.com:benjaoming/django-wiki.git

django-wiki @ 484ff1ce

-Subproject commit 484ff1ce497574045e78d4e3ea0ff55ac9b4bd30

requirements.txt

@@ -44,4 +44,5 @@ django-ses
 django-storages
 django-threaded-multihost
 django-sekizai<0.7
+git+git://github.com/benjaoming/django-wiki.git@484ff1ce49
 -r repo-requirements.txt