added reset script, added author description to docker-compose

docker-compose.yml

-version: '2'
+# author: Daniel Seybold
+# contact: daniel.seybold@uni-ulm.de
+# description: sets up the Mowgli framework
 
+version: '2'
 services:
 
 ####### Cloudiator components #########

resetMowgli

+#!/bin/bash
+
+echo "starting to reset Mowgli..."
+docker-compose down
+
+docker system prune -f
+
+docker volume prune -f
+
+
+rm -r /var/lib/cloudiator/cloudiator-store/*
+
+docker-compose up -d
+
+echo "finished resetting Mowgli!"
\ No newline at end of file