0.1.2

Minor Update: UX and Traversal Path Changes

• Improve user experience with more progress bars and logging.
• Slightly change traversal method in outside and outside maximization algorithms,
  this should only affect inference on inferred tree sequences with large numbers
  of nodes at the same frequency.
• Improve reporting of current project version
• Use appdirs for default caching location
• Prevent dating tree sequences with dangling nodes