Add custom display to ParserException in order to handle newlines correctly

[ChrisRackauckas]

See the discussion in https://github.com/SciML/BaseModelica.jl/pull/48

[oxinabox]

This looks reasonable. I think it should ave a test that calls repr and checks there is no literal \n in output.

Also we need to move this repo. While I have merge rights here i do not have permissions to move it. cc @andrewcooke

Also we need to fix CI