added simple script printing changes in local config (using colordiff)

Author: sjentzsch

ansible/roles/tensorflow/tasks/main.yml

@@ -8,6 +8,7 @@
   apt: name={{item}} state=latest
   with_items:
     - aptitude
+    - colordiff
     - wget
     - python-dev
     - python3-dev

config/diff.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+
+echo "(1/2) config local:"
+colordiff config.local.sample.yml config.local.yml
+
+echo "(2/2) config obj_detect:"
+colordiff config.obj_detect.sample.yml config.obj_detect.yml