#49 Give informative build errors

[Daniel Bratell]

There's one thing with XDoclet that's driving me nuts
and that is the error handling.

When something is wrong you get
[ejbdoclet] javadoc: In doclet class
xdoclet.DocletTask$DocletMain, method start has thrown
an exception java.lang.reflect.InvocationTargetException
[ejbdoclet] Running XDoclet failed.
[ejbdoclet] <<>>
[ejbdoclet] 1 error

and the only thing you know is that something,
somewhere is wrong. Right now it works because we are
very few in the project and we have quite good version
managment so I can go through all changes and try with
or without that change until it works.

It's just not scalable.