don't build chrome extension in travis
Add site config for Instructables
Add site config for Code Academy
Merge pull request #300 from lolux/site-ca

Add site config for Code Academy
Merge pull request #299 from lolux/site-instructables

Add site config for Instructables
various small fixes
Merge branch 'develop'
Merge branch 'master' of github.com:waltzio/waltz