Version 0.3.0.3

See the changelog for a detailed list of changes.

Summary:

• Library API: no changes.
• Executable behaviour: the environment variable used to pass in a password has changed from PASSWORD to HUP_HACKAGE_PASSWORD.
  (Fixes #14)
• Repository changes: tidying and improved tests.
• Repo comparison: v0.3.0.2...v0.3.0.3

A statically linked executable is available for Linux (AMD64) as an attachment below.