update to roundcube 1.0.3, and really update

Updating existing installed was broken. The new roundcube would be copied into a subdirectory of /usr/local/lib/roundcubemail.

Also fixes the image thumbnail issue raised on the forum (https://discourse.mailinabox.email/t/roundcube-thumbnails-not-showing/136), see http://trac.roundcube.net/wiki/Changelog.

setup/webmail.sh

@@ -29,7 +29,7 @@ apt_install \
 apt-get purge -qq -y roundcube* #NODOC
 
 # Install Roundcube from source if it is not already present or if it is out of date.
-VERSION=1.0.2
+VERSION=1.0.3
 needs_update=0 #NODOC
 if [ ! -f /usr/local/lib/roundcubemail/version ]; then
 	# not installed yet #NODOC
@@ -43,6 +43,7 @@ if [ $needs_update == 1 ]; then
 	rm -f /tmp/roundcube.tgz
 	wget -qO /tmp/roundcube.tgz http://downloads.sourceforge.net/project/roundcubemail/roundcubemail/$VERSION/roundcubemail-$VERSION.tar.gz
 	tar -C /usr/local/lib -zxf /tmp/roundcube.tgz
+	rm -rf /usr/local/lib/roundcubemail
 	mv /usr/local/lib/roundcubemail-$VERSION/ /usr/local/lib/roundcubemail
 	rm -f /tmp/roundcube.tgz
 	echo $VERSION > /usr/local/lib/roundcubemail/version