Adds uploader for SidekickImages. Fixes #81.
Adds minimagick for resizing the files uploaded through carrierwave.
Adds a HeroImage to the home page. Fixes #67.
Creates new layout specifically for home page. Fixes #86.
Adds four sidekick images to the home page. Fixes #68.
Merge pull request #88 from WGBH/add-sidekicks-to-home

Add sidekicks to home