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-monotonic/Config.in

@@ -0,0 +1,6 @@
+config BR2_PACKAGE_PYTHON_MONOTONIC
+	bool "python-monotonic"
+	help
+	  An implementation of time.monotonic() for Python 2 & < 3.3.
+
+	  https://github.com/atdt/monotonic

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

@@ -0,0 +1,5 @@
+# md5, sha256 from https://pypi.org/pypi/monotonic/json
+md5	9f81cb0e5966479754453dea2b6822f4  monotonic-1.5.tar.gz
+sha256	23953d55076df038541e648a53676fb24980f7a1be290cdda21300b3bc21dfb0  monotonic-1.5.tar.gz
+# Locally computed sha256 checksums
+sha256	cb5e8e7e5f4a3988e1063c142c60dc2df75605f4c46515e776e3aca6df976e14  LICENSE

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

@@ -0,0 +1,14 @@
+################################################################################
+#
+# python-monotonic
+#
+################################################################################
+
+PYTHON_MONOTONIC_VERSION = 1.5
+PYTHON_MONOTONIC_SOURCE = monotonic-$(PYTHON_MONOTONIC_VERSION).tar.gz
+PYTHON_MONOTONIC_SITE = https://files.pythonhosted.org/packages/19/c1/27f722aaaaf98786a1b338b78cf60960d9fe4849825b071f4e300da29589
+PYTHON_MONOTONIC_SETUP_TYPE = setuptools
+PYTHON_MONOTONIC_LICENSE = Apache-2.0
+PYTHON_MONOTONIC_LICENSE_FILES = LICENSE
+
+$(eval $(python-package))