Installing nginx from ppa
setting nginx types_hash_bucket_size to 64

this fixes a bug on 64bits vms

* http://www.mail-archive.com/wikibugs-l@lists.wikimedia.org/msg230376.html
* http://trac.nginx.org/nginx/ticket/352
Updating requirements.txt
Removing proxy
Merge branch 'master' into haystack
Removing old templatetag from load
Fixing user's pizza charts