Webeditor: Added git pull before git push.

Makefile

@@ -66,7 +66,7 @@ distclean: clean
 ## Web Editor stuff -- this works only with additional manual adjustments
 
 background:
-	@nohup sh -c 'if [ ! -e .background ] ; then touch .background ; rm -f .background-again bjcp-2015-styleguide-de.xml web/bjcp-2015-styleguide-de.xml ; make ; if [ -e .git-push ] ; then rm .git-push ; git push ; fi ; rm .background ; if [ -e .background-again ] ; then rm bjcp-2015-styleguide-de.xml web/bjcp-2015-styleguide-de.xml ; make background ; fi ; else touch .background-again ; fi' >/dev/null 2>&1 &
+	@nohup sh -c 'if [ ! -e .background ] ; then touch .background ; rm -f .background-again bjcp-2015-styleguide-de.xml web/bjcp-2015-styleguide-de.xml ; make ; if [ -e .git-push ] ; then rm .git-push ; git pull ; git push ; fi ; rm .background ; if [ -e .background-again ] ; then rm bjcp-2015-styleguide-de.xml web/bjcp-2015-styleguide-de.xml ; make background ; fi ; else touch .background-again ; fi' >/dev/null 2>&1 &
 
 install-home:
 	ssh z "cd /var/www ; if [ -d bjcp-2015-styleguide ] ; then cd bjcp-2015-styleguide ; sudo -u www-data git pull ; sudo -u www-data make ; else sudo -u www-data git clone https://github.com/frsteinb/bjcp-2015-styleguide.git ; cd bjcp-2015-styleguide ; sudo -u www-data mkdir web/snippets ; sudo -u www-data make ; fi"