Cleanup

• More readable code
• Functioning linter
• No more dependencies!
• Fewer devDependencies
• Replace aria-selected with aria-pressed

Accessibility

#11 adds aria attributes to buttons

1.0.6: Merge pull request #7 from bmathews/dateutils-dep

Adds tests and fixes reliance on internal react-day-picker method

1.0.5

Update to latest stable React and react-day-picker

Add key-handling events

See #3 (thanks @bmathews!)