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-gitpython/Config.in

@@ -0,0 +1,7 @@
+config BR2_PACKAGE_PYTHON_GITPYTHON
+	bool "python-gitpython"
+	select BR2_PACKAGE_PYTHON_GITDB2 # runtime
+	help
+	  Python Git Library.
+
+	  https://github.com/gitpython-developers/GitPython

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

@@ -0,0 +1,5 @@
+# md5, sha256 from https://pypi.org/pypi/GitPython/json
+md5	cee43a39a1468084d49d1c49fb675204  GitPython-2.1.11.tar.gz
+sha256	8237dc5bfd6f1366abeee5624111b9d6879393d84745a507de0fda86043b65a8  GitPython-2.1.11.tar.gz
+# Locally computed sha256 checksums
+sha256	fd657ffc2cef63d25c78cab7808d414dd03a282e63893491fd11c32f98be67fb  LICENSE

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

@@ -0,0 +1,14 @@
+################################################################################
+#
+# python-gitpython
+#
+################################################################################
+
+PYTHON_GITPYTHON_VERSION = 2.1.11
+PYTHON_GITPYTHON_SOURCE = GitPython-$(PYTHON_GITPYTHON_VERSION).tar.gz
+PYTHON_GITPYTHON_SITE = https://files.pythonhosted.org/packages/4d/e8/98e06d3bc954e3c5b34e2a579ddf26255e762d21eb24fede458eff654c51
+PYTHON_GITPYTHON_SETUP_TYPE = setuptools
+PYTHON_GITPYTHON_LICENSE = BSD-3-Clause
+PYTHON_GITPYTHON_LICENSE_FILES = LICENSE
+
+$(eval $(python-package))