reprganized docker file, less layers, new shortcuts for management commands

docker/install_management_commands.sh

@@ -0,0 +1,6 @@
+for command in document_archiver document_exporter document_importer mail_fetcher document_create_classifier document_index document_renamer document_retagger document_thumbnails;
+do
+	echo "installing $command..."
+	sed "s/management_command/$command/g" management_script.sh > /usr/local/bin/$command
+	chmod +x /usr/local/bin/$command
+done

docker/management_script.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+
+set -e
+
+cd /usr/src/paperless/src/
+
+if [[ $(id -u) == 0 ]] ;
+then
+  sudo -HEu paperless python3 manage.py management_command "$@"
+elif [[ $(id -un) == "paperless" ]] ;
+then
+  python3 manage.py management_command "$@"
+else
+  echo "Unknown user."
+fi