MycroftOS: Implementation of a very first initial bootable version

- Add Buildroot patches to downgrade / upgrade package dependencies
  in line with the Mycroft A.I. software stack requirements.
- Add buildroot additional package dependencies in line with the
  Mycroft A.I. software stack requirements.
- Update rpi3 defconfig file.
- Implement initial root_fs overlay filestructure.
- Addition of some quick and dirty helper scripts.
- Update of README to reflect these changes.

buildroot-external/package/python-mycroft/0001-Enforce-UTF8-encoding.patch

@@ -0,0 +1,25 @@
+From 28a9ff65a9b71ad70b906d688b7b2f593ea108cc Mon Sep 17 00:00:00 2001
+From: Peter Steenbergen <info@j1nx.nl>
+Date: Fri, 5 Oct 2018 09:42:55 +0200
+Subject: [PATCH 1/1] Enforce UTF8 encoding
+
+---
+ mycroft/dialog/__init__.py | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/mycroft/dialog/__init__.py b/mycroft/dialog/__init__.py
+index 59b4a44a0d..59c521b929 100644
+--- a/mycroft/dialog/__init__.py
++++ b/mycroft/dialog/__init__.py
+@@ -45,7 +45,7 @@ class MustacheDialogRenderer(object):
+             template_name (str): a unique identifier for a group of templates
+             filename (str): a fully qualified filename of a mustache template.
+         """
+-        with open(filename, 'r') as f:
++        with open(filename, 'r', encoding='utf-8') as f:
+             for line in f:
+                 template_text = line.strip()
+                 if template_name not in self.templates:
+-- 
+2.11.0
+