Merge pull request #41 from stephen-turner/master

jond v stephentu
Update games
Merge pull request #42 from jjd27/patch-10

Update games
Update games
Merge pull request #43 from jjd27/patch-11

Update games
Update games
Factor out print into separate subcommand
Update games
Stub out new 'history' subcommand
Keep track of players past ratings
Use proper type for date
Support printing rating history
Output CSV history
Add command line option for history format
Stub out gnuplot printer
Fill out gnuplot implementation
Plot graph as part of travis job
Update README with new man page
Bump version to 0.2
Update README with info on live page