Show error messages in UI (#43)
Show error messages in UI (#43)

* Show error messages in UI

Also:

- Introduce a color palette
- Change the errorhandling around MainLoop to actually show tracebacks
  instead of just exiting

* Use fancy new Python 3 semantics

pimutils/todoman,hobarrera/todoman,AnubhaAgrawal/todoman,rimshaakhan/todoman,asalminen/todoman,Sakshisaraswat/todoman