Merge branch 'master' of git://github.com/melinath/philo

* 'master' of git://github.com/melinath/philo:
  Added 1.2.X compatibility to shipherd LazyNavigationRecurser.
  Minor tweaks to sobol result handling.
  Minor corrections and improvements to sobol.
  Added crude double-import detection to search registration. Added Django 1.2 fallback to SlugMultipleChoiceField formfield method.
  Fixed a sobol bug which was causing search views to always use all available searches. Added some help text to the ajax api boolean.
  Modified the get_start and get_end methods to return datetimes if times are specified.