add ruby-version
update libv8 for yosemite
pin sprockets - new version causes problems

with stylesheet compilation
pin bootstrap version
update a few low-level dependencies
update rspec and cucumber
update all the things (nearly)
update datakitten and cvslint
fix unzipping of multiple files
Update rails to 4.0.12
Merge pull request #175 from theodi/update-dependencies

Update dependencies