Completed all get request

All GET request return their values, except the webscripts.
Datastorage

The settings class reads the datastorage location from the config file
and offers a public method to get the location.
File POST-Request

It's possible to upload a file.
TODO: Set up a maven project.
File checksum, SQL-Script

Added a content checksum to the file class and updated the sql-script.
Unimplemented Methods, Improvement

Added the unimplemented methods to the data providers and several
improvements in the file resource class.
Create MySQL tables

If the database does not contain any tables, they will be created.
Create new bunker implemented
Able to create a folder
Updated MySQL script
Added property for datastorage