v1.1.0

https://wintermade.it/blog/posts/new-release-screenon-v11.html

Introduced by Pull Request #2 :

• (build) TravisCI integration, based on Docker

Introduced by Pull Request #3 :

• (database) Add index on screenon table
• (frontend) automatically load data from a week ago to today
• (frontend) handle "no data" case in distribution view and daily usage view
• (frontend) write tests for client-side data manipulation functions
• (frontend) rework distribution view: replace scatter chart with horizontal bar chart to show classes of usage (under 5 seconds, 5-10 seconds, 10-30 seconds, 30 seconds to one minute, 1-5 minutes, over 5 minutes)