Switch to one-liner for NeuroDebian setup on Travis
Remove superfluous apt-get update call

This is already done in the neurodebian-travis.sh script
Merge pull request #24 from ajdm/travisci

Switch to using neurodebian-travis.sh script for NeuroDebian setup
Merge branch 'master' of https://github.com/jefferis/nat

* 'master' of https://github.com/jefferis/nat:
  Remove superfluous apt-get update call
  Switch to one-liner for NeuroDebian setup on Travis