Workflow to sync code from github.com/tensorflow/tensorflow (#35)

.github/workflows/sync.yml

+# YAML schema for GitHub Actions:
+# https://help.github.com/en/actions/automating-your-workflow-with-github-actions/workflow-syntax-for-github-actions
+#
+# Helpful YAML parser to clarify YAML syntax:
+# https://yaml-online-parser.appspot.com/
+#
+
+name: Sync from Upstream TF
+
+on:
+  schedule:
+    - cron: '0 8 * * *'
+
+  # Allow manually triggering of the workflow.
+  workflow_dispatch: {}
+
+jobs:
+  sync:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/setup-python@v2
+      - uses: actions/checkout@v2
+      - name: Create TFLM tree
+        run: |
+          ./ci/sync_from_upstream_tf.sh
+      - name: Create Pull Request
+        uses: peter-evans/create-pull-request@052fc72b4198ba9fbc81b818c6e1859f747d49a8
+        with:
+          branch: sync-from-upstream-tf
+          delete-branch: true
+          title: Automated sync from github.com/tensorflow/tensorflow
+          commit-message: Automated sync from github.com/tensorflow/tensorflow
+          body: ""
+          labels: ci:run

README.md

+<!--ts-->
+   * [TensorFlow Lite for Microcontrollers](#tensorflow-lite-for-microcontrollers)
+   * [Build Status](#build-status)
+      * [Official Builds](#official-builds)
+      * [Community Supported Builds](#community-supported-builds)
+   * [Additional Documentation](#additional-documentation)
+
+<!-- Added by: advaitjain, at: Thu 29 Apr 2021 12:53:08 PM PDT -->
+
+<!--te-->
+
 # TensorFlow Lite for Microcontrollers
 
 The TFLM code is currently in the process of being refactored out of the
@@ -22,3 +33,7 @@ Arduino         | [![Arduino](https://github.com/tensorflow/tflite-micro/actions
 Cortex-M        | [![Cortex-M](https://github.com/tensorflow/tflite-micro/actions/workflows/cortex_m.yml/badge.svg)](https://github.com/tensorflow/tflite-micro/actions/workflows/cortex_m.yml) |
 Sparkfun Edge   | [![Sparkfun Edge](https://github.com/tensorflow/tflite-micro/actions/workflows/sparkfun_edge.yml/badge.svg)](https://github.com/tensorflow/tflite-micro/actions/workflows/sparkfun_edge.yml) |
 
+
+# Additional Documentation
+
+ * [Continuous Integration](docs/continuous_integration.md)

docs/continuous_integration.md

+<!--ts-->
+   * [Automated Sync from the Tensorflow Repository](#automated-sync-from-the-tensorflow-repository)
+   * [Third Party GitHub Actions Used](#third-party-github-actions-used)
+
+<!-- Added by: advaitjain, at: Thu 29 Apr 2021 12:54:23 PM PDT -->
+
+<!--te-->
+
+[TensorFlow repo]: https://github.com/tensorflow/tensorflow
+
+# Automated Sync from the Tensorflow Repository
+
+While TfLite Micro and TfLite are in separate GitHub repositories, the two
+projects continue to share common code.
+
+The [TensorFlow repo][] is the single source of truth for this
+shared code. As a result, any changes to this shared code must be made in the
+[TensorFlow repo][] which will then automatically sync'd via a scheduled
+[GitHub workflow](../.github/workflows/sync.yml).
+
+
+# Third Party GitHub Actions
+We use the following third party actions as part of the TFLM continuous
+integration system.
+
+ * [Create a PR](https://github.com/peter-evans/create-pull-request) to automate
+   sync'ing of shared TfLite and TFLM code.
+