Add Travis build tasks

Not plugged in anywhere, but ready for when we go Full Travis
Add links to Trello cards
Merge pull request #158 from theodi/feature-add-link-to-trello-cards

Add links to Trello cards
Titles to sentence case
Merge pull request #159 from theodi/feature-capitalisation

Standardise titles
Merge branch 'master' of github.com:theodi/dashboards into feature-travis-builds
Replace Jenkins builds with Travis
Merge pull request #160 from theodi/feature-travis-builds

Replace Jenkins builds with Travis builds
Who you gonna call?
Merge pull request #161 from theodi/feature-cache-busting

Cache busting
Add missing env variable
Merge branch 'master' of github.com:theodi/dashboards into scale-to-window

Conflicts:
	assets/stylesheets/application.scss
	dashboards/commercial.erb
	dashboards/company/2014.erb
	dashboards/membership.erb
	dashboards/network/2014.erb
	dashboards/news_articles.erb
	dashboards/opex/2014.erb
	dashboards/progress.erb
	dashboards/reach/2014.erb
	dashboards/tech.erb