Merge pull request #71 from zborboa-google/master

Fix #45: Replace HHVM's built-in webserver with Nginx for continuous integration tests
minus performance enhance
Merge pull request #72 from Yahasana/patch-1

Add minor performance enhancements
Fix #73: Add PHP 5.3 to continuous integration tests
Merge pull request #74 from zachborboa/master

Add PHP 5.3 to continuous integration tests
Swap assertion parameter order
Remove PHP 5.3 from continuous integration test allowed failures
Merge pull request #75 from zachborboa/master

Remove PHP 5.3 from continuous integration test allowed failures