This repo shows how to use a late-model cmake on travis-ci without impact to your build times. The important piece in your ``.travis.yml` file:

addons:
  apt:
    sources:
      - george-edison55-precise-backports
    packages:
      - cmake
      - cmake-data

Nathan Osman hooked us up with his precise-backports PPA, which is on the list that Travis trusts. Thanks, Nathan!