Add Github workflows for compiling examples and spell checking

Author: sandeepmistry

.github/workflows/compile-examples.yml

@@ -0,0 +1,20 @@
+name: Compile Examples
+on: [push, pull_request]
+jobs:
+ build:
+   runs-on: ubuntu-latest
+
+   strategy:
+     matrix:
+       fqbn: [
+         "arduino:samd:mkrzero"
+       ]
+
+   steps:
+     - uses: actions/checkout@v1
+       with:
+         fetch-depth: 1
+     - uses: arduino/actions/libraries/compile-examples@master
+       with:
+         fqbn: ${{ matrix.fqbn }}
+         libraries: SD

.github/workflows/spell-check.yml

@@ -0,0 +1,11 @@
+name: Spell Check
+on: [push, pull_request]
+jobs:
+ build:
+   runs-on: ubuntu-latest
+
+   steps:
+     - uses: actions/checkout@v1
+       with:
+         fetch-depth: 1
+     - uses: arduino/actions/libraries/spell-check@master

README.md

@@ -1,5 +1,7 @@
 # ArduinoSound
 
+[![Compile Examples Status](https://github.com/arduino-libraries/ArduinoSound/workflows/Compile%20Examples/badge.svg)](https://github.com/arduino-libraries/ArduinoSound/actions?workflow=Compile+Examples) [![Spell Check Status](https://github.com/arduino-libraries/ArduinoSound/workflows/Spell%Check/badge.svg)](https://github.com/arduino-libraries/ArduinoSound/actions?workflow=Spell+Check)
+
 A simple way to play and analyze audio data using Arduino. Currently only supports SAMD21 boards and I2S audio devices.
 
 For more information about this library please visit us at