removes Object_Freezer from repository becuase it is a third party library with should be added through PEAR or composer
adds composer.json and makes use of composers autoloader and also adds phpunit.xml.dist which helps using travis-ci - adds composer install to .travis.yml
removes DI/Bootstrap.php file which is unused now in favor for composer
Merge branch 'master' of github.com:DennisBecker/Di