don't complain about raw headers that are not name: value

For example, HTTP/1.1 401 Unauthorized
Return the correct class name for helper
Delete from tables in reverse order to avoid foreign key constraint errors.
Fix using tables in fixtures that don't have entity configs.
Make error messages more helpful for debugging.
Prevent fatal error when indexer is not present.
Merge pull request #146 from colinmollenhour/fixes

Fixes for foreign key checks, arbitrary tables and disabled indexers
Fix phpunit extension to run on remote server
Merge pull request #134 from sourcerer-mike/dev-helperFix

Helper can not be mocked
Merge pull request #87 from thomasvs/bug-http-rawheaders-dev

don't complain about raw headers that are not name: value
Merge remote-tracking branch 'origin/dev' into improved_error_reporting_on_fixture_loader