v0.5.0

Features:

• Add reporting of data types.
• Paths are now encapsulated in a Path object (API change).
• Add version flag on command-line tool.
• Improve handling of ports.
  - Distinguish from other variables.
  - Reporting of ports that are also registers.
  - Limiting of 'top' instances to eliminate duplicate paths in fan in and out queries.

Miscellaneous:

• Split up unit tests.
• Various updates to the documentation.
• Add 'only errors' logging level option to supress warnings.

Full changelog: v0.4.1...v0.5.0