Implementing #9 PHP 5.3 support
Updating composer.json for php 5.3
Merge remote-tracking branch 'upstream/master' into php53

Conflicts:
	.travis.yml
	spec/Knp/JsonSchemaBundle/DependencyInjection/Compiler/RegisterJsonSchemasPassSpec.php
Merge pull request #10 from stanlemon/php53

Implementing #9 PHP 5.3 support