Changes required by Trevor for new deployment process.
Merge master branch changes
Update build-site script
Add deb build scripts to main repository.
Merge branch 'master' into kainoschanges
Add .ruby-version to .gitignore file.
Update country.html.erb

Revert slice point change to avoid issues when generating country pages that don't have a description:

revert - slicePoint    : <%= country['description'].index('<!--(more)-->') || 300 %>, 
to - slicePoint    : 300,
Merge pull request #194 from DFID/kainoschanges

Changes required by Kainos for new deployment process.