bump version number
Merge branch 'release/0.1.0' into develop

* release/0.1.0:
  bump version number
Add feature for "due"
Feature to show todays date in output
Introduce due attribute on Todo
introduce on_date filter on todolist
introduce before_date filter
Introduce due-feature.
Brighten the headers.
Merge pull request #7 from berkes/feature/due

Introduce a "due" feature