Update to Vagrant configuration version 2.
Rename rstudio to r as short hostname no longer a problem.
Rename postgres to postgresql
Update Puppet modules from Forge.
Use nodejs module to install node.
Add puppet repository to dev for easy puppet update.
Add Saiku box.
Comment note. Fix #21.
Itemise available VMs in README.md
Shuffle the gnuplot installation around until it is in a happier place.
Development boxgrinder VM for building AWS AMIs.
Ensure lxml and its dependencies are installed before messytables.

Messytables has a pip dependency on lxml which is not represented in the management
dependencies in puppet package. This means the messytables install may break if it is
pipped in before the lxml libxml regular dependencies.
Fix typo.
Error out of bash scripts instead of continuing.
Update Sage to latest version and include same packages as R.
Add comment note about boxgrinder vm.
Use the latest PhantomJS download in building the VM.
Add executable to the standard PATHs.
Include VM for SlimerJS.
Wrong quotes for Puppet variable expansion.