Remove unneccessary css and js files from files_external

Fix #8
adding configuration files for travis-ci and scrutinizer-ci
ignore jquery libs in .scrutinizer.yml
Merge pull request #23 from owncloud/qa

adding configuration files for travis-ci and scrutinizer-ci
Merge pull request #22 from owncloud/issue/8

Remove unneccessary css and js files from files_external
Remove full class name and old property
Delete activities and email queue entries when deleting users

Fix #16
Add bootstrap for tests
Add unit test for Hooks::deleteUser