File of screensavers added. Paired by Richard and Michae.

There now exists a file in which we can place our screensavers. This means the database only has to call a script
to update the screensavers it holds for the display. (Feature #180)
Documentation added for Feature 180
Script for updating screensavers table complete. Paired by Richard and Michael.

The script for updating the internal database's screensavers table has been written and according to tests, works. (Feature #
180).
Merge pull request #75 from CO600GOL/feature/#180_sceensaver_file

Feature/#180 sceensaver file