Clickable link to test location in failure report

[apjanke]

It would be cool if, in the report output that listed test failures, it had a clickable link that would open the tested file in the editor and take you to the position of the failed test.

Doing this will probably take:

• Tracking the file path and source file line number in BistBlock
• Tracking individual errors in test2 and tying them to the failed BistBlocks
• A detailed output form that listed each individual test block failure
• Whatever formatting magic is used to make clickable links in the Octave Command Window
• A test to see if we’re connected to the Command Window. This prob needs to go beyond isatty(), bc the CLI version of Octave doesn’t support this.