Add readme and deploy workflow

Author: manokara

.github/workflows/deploy.yml

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+on: push
+name: Deploy
+jobs:
+  linux:
+    name: Linux 64-bits
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+      - uses: actions-rs/cargo@v1
+        with:
+          command: build
+          args: --release
+  mac:
+    name: macOS
+    runs-on: mac-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+      - uses: actions-rs/cargo@v1
+        with:
+          command: build
+          args: --release
+  windows:
+    name: Windows 64-bits
+    runs-on: windows-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+      - uses: actions-rs/cargo@v1
+        with:
+          command: build
+          args: --release

README.md

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+Testing how to deploy rust projects with GitHub Actions.