bench.rb, add to load path relative to file, not to shell Working Directory!
bench.rb, add to load path relative to file, not to shell Working Directory!

fixes problem I mentioned running bench in #13. If you didn't run from ./bench
dir, it would not add ./lib to path, and would then end up using files
from installed traject gem instead of local checkout. oh my.

ndushay/traject,traject/traject