Add a .github workflow to build with CMake on Ubuntu

Author: SRombauts

.github/workflows/main.yml

@@ -0,0 +1,21 @@
+name: build
+
+on: [push]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v1
+    - name: Submodule SQLiteCpp
+      run: |
+        git submodule init
+        git submodule update
+    - name: CMake generate & build
+      run: |
+        mkdir -p build
+        cd build
+        cmake ..
+        cmake --build .

README.md

@@ -1,6 +1,10 @@
 SQLiteC++
 ---------
 
+[![release](https://img.shields.io/github/release/SRombauts/SQLiteCpp.svg)](https://github.com/SRombauts/SQLiteCpp/releases)
+[![license](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/SRombauts/SQLiteCpp/blob/master/LICENSE.txt)
+[![GitHub Actions Build status](https://github.com/SRombauts/SQLiteCpp_Example/workflows/build/badge.svg)](https://github.com/SRombauts/SQLiteCpp_Example/actions "GitHhub Actions Build status")
+
 [SQLiteC++ (SQLiteCpp)](https://github.com/SRombauts/SQLiteCpp) is a smart and easy to use C++ SQLite3 wrapper.
 
 [See SQLiteC++ website on GitHub](http://srombauts.github.com/SQLiteCpp).