More robust error logging for failed builds

[#1]

If a rule or data element fails I would like to see more robust error messaging in the build screen, e.g. which rule or data element failed rather than a generic failed message.

[#2]

At a minimum, it would be nice to have rule names used in the build error messages instead of the internal rule ID's.

[#3]

It's coming.  We're in the middle of standardizing the way that error messages are created/delivered through the whole system.  The messaging for failed builds is included.