added Tobias's code
some tests
Adding more files from Tobias

MySQL database import, export, merge and new dataset tools creation.
file was missing
MySQL dump was not working

It couldn't find the right path for ``mysqldump``. Fixed, works for now.
Tools to import and merge databases

It is possible to merge databases. All data that is not already in the current
database will be incorporated. If there are conflicts, the changes will not be
made, and warning messages will be issued.
Scripts to MySQL import and merge

Do not remove the placeholder file index.html in uploads folder.