[1.x] Add stub .travis.yml about coding-standards

[mbabker]

Travis is enabled.

[photodude]

how about

sudo: false
dist: trusty
language: php

matrix:
  include:
    - php: 5.3
      dist: precise
    - php: 5.4
    - php: 5.5
    - php: 5.6

branches:
  only:
    - master

[photodude]

I believe with the merge of #167 into master and 5d3474c into the 1.x branch this issue can be closed and we can turn on Travis-CI for the repo.