Add Github action workflows for CI

.github/workflows/ci.yml

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+name: CI-Release
+
+on:
+  push:
+    branches:
+      - master
+    
+jobs:
+  build-binary:
+    runs-on: ubuntu-18.04
+    steps:
+    - uses: actions/checkout@v2
+    - name: build binary
+      run: |
+        docker build . -t builder
+        docker run --rm -v ${PWD}:/project builder make
+    - uses: actions/upload-artifact@master
+      with:
+       name: binary
+       path: "payload.elf"
+  deploy-binary:
+    needs: build-binary
+    runs-on: ubuntu-18.04
+    steps:   
+    - name: Get environment variables
+      id: get_repository_name
+      run: |
+        echo ::set-env name=REPOSITORY_NAME::$(echo "$GITHUB_REPOSITORY" | awk -F / '{print $2}' | sed -e "s/:refs//")
+        echo ::set-env name=DATETIME::$(echo $(date '+%Y%m%d-%H%M%S'))   
+    - uses: actions/download-artifact@master
+      with:
+        name: binary
+        path: wiiu
+    - name: zip artifact
+      run: zip -r ${{ env.REPOSITORY_NAME }}_${{ env.DATETIME }}.zip wiiu
+    - name: Create Release
+      id: create_release
+      uses: actions/create-release@v1
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      with:
+        tag_name: ${{ env.REPOSITORY_NAME }}-${{ env.DATETIME }}
+        release_name: Nightly-${{ env.REPOSITORY_NAME }}-${{ env.DATETIME }}
+        draft: false
+        prerelease: true
+        body: |
+           Not a stable release:
+           ${{ github.event.head_commit.message }}
+    - name: Upload Release Asset
+      id: upload-release-asset 
+      uses: actions/upload-release-asset@v1
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      with:
+        upload_url: ${{ steps.create_release.outputs.upload_url }} # This pulls from the CREATE RELEASE step above, referencing it's ID to get its outputs object, which include a `upload_url`. See this blog post for more info: https://jasonet.co/posts/new-features-of-github-actions/#passing-data-to-future-steps 
+        asset_path: ./${{ env.REPOSITORY_NAME }}_${{ env.DATETIME }}.zip
+        asset_name: ${{ env.REPOSITORY_NAME }}_${{ env.DATETIME }}.zip
+        asset_content_type: application/unknown

.github/workflows/pr.yml

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+name: CI-PR
+
+on: [pull_request]
+
+jobs:
+  build-binary:
+    runs-on: ubuntu-18.04
+    steps:
+    - uses: actions/checkout@v2
+    - name: build binary
+      run: |
+        docker build . -t builder
+        docker run --rm -v ${PWD}:/project builder make
+    - uses: actions/upload-artifact@master
+      with:
+       name: binary
+       path: "*.elf"