Rename the project to Halcyon.
Set a lower bound on cmdargs to avoid a bug.
Update "Category" field in the cabal file and remove an unused dependency.
Add a 'dist' makefile target. Capitalize "Twitter" in the cabal file.
Rewrite CommandLine to use cmdargs and integrate the command-line and RC file options. Clean up imports and dead code.
Add an OptionalConfiguration type and parse one from ~/.twatrc.
Use test-framework instead of bare HUnit for the test suite. Use cabal integration for the test suite.
Use hyphens instead of underscores in access-token et al. Replace HTML entities once more.
Rewrite everything to use the JSON API with OAuth authentication.
Bump the HaXml dependency and add one on directory-1.1.*.
Update the cabal file to be more lenient about the versions of base and time we require.
Use the newer Data.Time library. Send mails with the "Date:" header set to the status' created_at time if possible.
Use cabal to build the binary and documentation.