Merge pull request #55 from joelwurtz/user-context

Vary cache on user context
Add FOS license header (fix #57)
Merge pull request #63 from FriendsOfSymfony/file-header

Add FOS license header (fix #57)
Fix HHVM on Travis by using FastCGI instead of built-in webserver
Merge pull request #65 from FriendsOfSymfony/hhvm-3

Fix HHVM on Travis by using FastCGI instead of built-in webserver
Improve user context caching docs (fix #59)

Unset req.http.X-FOSHttpCache-TempCookie

Fix errors and rename HTTP headers

Fix variable name

Fix syntax highlighting

Note that application not Varnish sets Vary header

Fix whitespace and rename HTTP headers

Add note that hash response should be invalidated

Simplify HTTP header names in Varnish config and make them consistent
Merge pull request #66 from FriendsOfSymfony/user-context-docs

Improve user context caching docs
add some edge case testing
Merge pull request #69 from FriendsOfSymfony/increase-test-coverage

add some edge case testing
Add tests for head request not in cache and vcl_pass configuration