Add Semaphore CI build status badge

README.md

@@ -1,5 +1,7 @@
 # Isn
 
+[![Build Status](https://semaphoreci.com/api/v1/projects/be7c4c34-c49e-45c7-9320-3fcc4f7f476a/458429/badge.svg)](https://semaphoreci.com/frost/isn)      
+
 Isn adds a [`Postgrex.Extension`][1] and [`Ecto.Type`][2] definitions
 for the datatypes defined in the [`isn`][3] PostgreSQL module.
 

test/isn_test.exs

@@ -4,7 +4,7 @@ defmodule IsnTest do
   alias Postgrex.Connection, as: P
 
   setup do
-		options = Keyword.merge(conn_options, [extensions: [{Isn, {}}]])
+    options = Keyword.merge(conn_options, [extensions: [{Isn, {}}]])
     {:ok, pid} = P.start_link(options)
     {:ok, [pid: pid]}
   end