updated gitignore
adding cache expire headers to static files

optimizing nginx to add cache headers to static files since pagekit
appends a version string to asset urls.
Also enabling gzip as it's not enabled by default on nginx.
adding varnish

optimized to cache assets by default, and user session unique cache on
dynamic requests using a key hash on the pagekit_session cookie.
All varnish cache is disabled for the /admin/ related urls.
researching gzip level
gzip research complete on comp level

most effective comp level is 5, as it still loads faster than apache
while delivering the same filesize result.
working on auto gen gz assets
gzip_static support
changed min length to avoid increasing file sizes
Merge pull request #1 from stipsan/varnish

Varnish
Merge pull request #1 from pagekit/master

merging from master