Add Travis-CI configuration for automated testing.

.travis.yml

@@ -0,0 +1,28 @@
+language: generic
+
+script:
+  - make
+  - make test
+
+sudo: false
+
+matrix:
+  include:
+    - os: linux
+      dist: trusty
+      compiler: gcc
+      addons:
+        apt:
+          sources: kalakris-cmake
+          packages:
+            - libxml2-dev
+            - ninja-build
+            - cmake
+    - os: osx
+      osx_image: xcode7.2
+      compiler: clang
+      before_install:
+        - brew update
+      install:
+        - brew reinstall cmake
+        - brew reinstall ninja