Generalise the way sheets are read and written
Version bump to 0.1.4
Fix crash when writing sheet if directory is missing
Implement a safe interface for loading sheets from file
Add #4 to the changelog
Include the date when printing different-day times
Add documentation to sheet module
Add documentation to the crate root
Add documentation to public types
Add documentation to Period
Update homepage to point to GitHub
Move Period to its own module in the library
Add links to mailing list and issue tracker
Change downloads badge to total downloads
Add maintenance badge
Version bump to 0.1.2
Include the current tracking period when counting
Update mirror script