Merge pull request #265 from asm89/backup

Introduce `backup` plugin to export/import settings

plugins/config/backup-export

@@ -0,0 +1,5 @@
+#!/bin/bash
+VERSION="$1"
+BASE_DIR="$2"
+
+cat; find $BASE_DIR -regex ".*/ENV"

plugins/config/backup-import

@@ -0,0 +1,9 @@
+#!/bin/bash
+VERSION="$1"
+IMPORT_DIR="$2"
+TARGET_DIR="$3"
+
+cd $IMPORT_DIR
+for file in `find . -regex ".*/ENV"`; do
+    cp $file "$TARGET_DIR/$file"
+done