Add PHP 5.5 to Travis config
Adds some archive tests.
Adds test for Tar archive constructor.
Adds some tests for Bzip2.
Corrects file related assertions and adds constructor test.
Rolling back extraction using streams of bzip, gzip archive. Marking their tests as skipped.
Move input files to input dir and clean output dir. Use reflection in place of inspector.
Corrects type of assertion used in tests.