Add missing docs files in tarball

Fix MANIFEST.in to include a few missing files in the docs.
Fixes bug 954910.

Change-Id: I8916dfb139607d33f9053a33b082b6eb44b00f3e

Author: ttx

AUTHORS

@@ -37,6 +37,7 @@ Neil Johnston <[email protected]>
 Paul McMillan <[email protected]>
 Stephane Angot <[email protected]>
 termie <[email protected]>
+Thierry Carrez <[email protected]>
 Tihomir Trifonov <[email protected]>
 Todd Willey <[email protected]>
 Tomasz 'Zen' Napierala <[email protected]>

MANIFEST.in

@@ -1,4 +1,4 @@
-recursive-include docs *.py *.rst *.css *.js *.html *.conf
+recursive-include docs *.py *.rst *.css *.js *.html *.conf *.jpg *.gif *.png *.css_t
 recursive-include horizon *.html *.js *.csv *.template *.mo *.po
 recursive-include openstack_dashboard *.html *.js *.css *.less *.csv *.template *.mo *.po *.example *.eot *.svg *.ttf *.woff *.png *.gif *.ico *.wsgi
 recursive-include tools *.py *.sh