[pgScript patch] Improved test output + make use of pgAdmin UI for error output

Hi,

Attached to this email, three patches for pgScript:
1. The first one improves the output of the pgScript integration test
suite: only a bash file has been modified.
2. The second one corrects an extra space introduced in the output
from the previous patch.
3. The third one enables pgScript to use the pgAdmin UI for error
output: when an error occurs while interpreting a script then the line
where the error occurred is signaled.

That's it. Those are the patches I was talking about a few days ago.
Nothing else to add before the beta release.

Best regards,
Mickael