Move plugin up a level for easy pip install via git

dev/tools/initfile.sh

@@ -1,4 +1,4 @@
-pip install -e /tmp/work/plugin
+pip install -e /tmp/work
 printf 'certbot_plugin_gandi:dns_api_key=%s\n' $GANDI_API_KEY > /tmp/config.ini && chmod 400 /tmp/config.ini 
 echo 'Example: certbot certonly --test-cert -a certbot-plugin-gandi:dns --certbot-plugin-gandi:dns-credentials /tmp/config.ini -d domain.com'
 exec /bin/sh