Fix bug where stderr would not appear and application would freeze when the stderr buffer is full and stdout is not being written to (in case of utterly broken tests)

Add toString instance for CustomFailReason

See merge request !10

Use source locations in JUnit export when available

See merge request !9

Resolve ""stop on first failed test" option"

Closes #6

See merge request !8

print invalid child messages

See merge request !7

Improve diff for Expr

See merge request !6

fix cycle in spine problem

See merge request !5

Resolve "gDiff for JSONNode utterly broken"

Closes #19

See merge request !4