Couldn't get PGP to fire without including resolver in same file

...and SBT didn't like to have a resolver defined twice
Publish uber-jar as 'bfg-VERSION.jar'

The rather tortured SBT declaration for setting the artifact name
can be improved, I'm sure.

http://stackoverflow.com/questions/8288859/how-do-you-remove-the-scala-version-postfix-from-artifacts-builtpublished-wi
https://groups.google.com/d/topic/simple-build-tool/Ub8-Fc2ObtM/discussion
https://groups.google.com/d/topic/simple-build-tool/JGVBQ8Lvuf8/discussion