README with a drone.io badge

README.md

+Hello CI
+========
+[![Build Status](http://134.130.169.56/api/badges/ywashio/hello-ci/status.svg)](http://134.130.169.56/ywashio/hello-ci)
+
+Let's say hello to CI (represented by drone)!
+
+# Building
+
+Just
+```
+make
+```
+
+# Installation
+
+Just
+```
+sudo cp -i main.o /usr/bin/hello-ci
+```