Start of error page view
Start of error page view
Adds an error page for uploaded files.

If there are errors with line numbers, it shows the entire file with
the erratic lines in red. Errors without line numbers are shown in a
simple list.
It is better to use ViewContextMixin and TemplateView directly, UiView too new and has extra functionality we don't use
PEP8 / Pyflakes on tests, added a test for a function in the error page view
Merge pull request #19 from lizardsystem/remco-wip-error-page

A page that shows the errors in an uploaded file