Add .travis.yml and .fixtures.yml

.fixtures.yml

+fixtures:
+  repositories:
+    "stdlib": "git://github.com/puppetlabs/puppetlabs-stdlib.git"
+  symlinks:
+    "postfix": "#{source_dir}"

.travis.yml

+language: ruby
+rvm:
+  - 1.8.7
+  - 1.9.3
+  - 2.0.0
+  - ruby-head
+env:
+  - PUPPET_GEM_VERSION=">= 3.0.0"
+matrix:
+  allow_failures:
+    - rvm: 2.0.0
+    - rvm: ruby-head
+  include:
+    - rvm: 1.8.7
+      env: PUPPET_GEM_VERSION="~> 2.7"