Create tgz archive when only db is backuped

Creating a tgz file for all types of backup. To allow the user to see what the
backup contains, the "skip-db" and "skip-fs" changes the filename for the
resulting archive.
Delete the database dump at the end if it has been created.
No newline at end of file
Merge branch 'master' of git://github.com/mogensen/typo3scripts into dev
Fixed unbound variable
Removed duplicate code