fix #17 -- this needs good testing before release...
iteration on benchmarking utils

make class, simplify code, use numpy
add some sanity checks, reformatting, better numpy integration
snapshot
fix url parse regression on empty elements
more benchmark cleanup
include pid into log formatter, for multiprocess environments
fix numpy import scope
bump python version dependency to 2.6
add simple time diff support
small fixes to time manipulation utils...
support port unsetting
make URL setter type checks consistent
prepare release

  - restructure benchmark utils
  - fix error messages in signature checks
  - fix defaults in URL class