Improvements and fixes by dusank

I am currently in the process of reviewing SBT in Action and will be pushing any improvements and/or fixes onto this branch.

=Dusan
Generally, these should be in a global .gitignore rather than here.  I'm ok leaving them in, but I commit to lots of projects which disallow them :).

IF you don't already have a global gitignore for such things I'd highly recommend it!