Added support for testing for existence of errors and printing errors. - Added hook to intercept ANTLR errors.
Added support for testing for existence of errors and printing errors.
- Added hook to intercept ANTLR errors.

Signed-off-by: Jakob Brandsborg Ehmsen <387ed33cc9ebf98b733caa2520baacd616b28aa5@gmail.com>
jakobehmsen/duro