added travis.ci support

.travis.yml

@@ -0,0 +1,4 @@
+sudo: false
+install: git clone --depth 1 https://github.com/sstephenson/bats.git
+script: PATH="./bats/bin:$PATH" test/run
+language: c

test/run

@@ -0,0 +1,4 @@
+#!/usr/bin/env bash
+set -e
+
+exec bats ${CI:+--tap} test/{lib,plugins}