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-xmlrunner/Config.in

@@ -0,0 +1,6 @@
+config BR2_PACKAGE_PYTHON_XMLRUNNER
+	bool "python-xmlrunner"
+	help
+	  PyUnit-based test runner with JUnit like XML reporting.
+
+	  https://github.com/pycontribs/xmlrunner

buildroot-external/package/python-xmlrunner/python-xmlrunner.hash

@@ -0,0 +1,3 @@
+# md5, sha256 from https://pypi.org/pypi/xmlrunner/json
+md5	7b0b152ed2d278516aedbc0cac22dfb3  xmlrunner-1.7.7.tar.gz
+sha256	5a6113d049eca7646111ee657266966e5bbfb0b5ceb2e83ee0772e16d7110f39  xmlrunner-1.7.7.tar.gz

buildroot-external/package/python-xmlrunner/python-xmlrunner.mk

@@ -0,0 +1,12 @@
+################################################################################
+#
+# python-xmlrunner
+#
+################################################################################
+
+PYTHON_XMLRUNNER_VERSION = 1.7.7
+PYTHON_XMLRUNNER_SOURCE = xmlrunner-$(PYTHON_XMLRUNNER_VERSION).tar.gz
+PYTHON_XMLRUNNER_SITE = https://files.pythonhosted.org/packages/57/c0/a19e29bc6038a56bb690549573af6ea11a9d2a5c07aff2e27ed308c2cab9
+PYTHON_XMLRUNNER_SETUP_TYPE = setuptools
+
+$(eval $(python-package))