#455844 follow-up by yched: Change render() to print render() for consistency with other template variables.

#452538 by Mike Wacker: Allow node access modules to have control over unpublished nodes. (with tests)

- Patch #243129 by jrchamp, DamZ, mfb, catch, justinrandell, macgirvin, et al: faster implementation of format_date(). Woot.

- Patch #497590 by Dave Reid: remove pointless 'system paths only' warning from admin/settings/site-information.

- Patch #503456 by catch: remove multiple tid and depth handling for core taxonomy paths.  Snif. ;-)

- Patch #504098 by eigenator, Xano, Keith.smith et al: better help text for path administration page.

  We can work on creating a generic framework for adding tasks later, if that is deemed necessary. I'm still not sure it is, and in the mean time, this patch addresses an important usability issue.

- Patch #314358 by wonder95: only set ignore_slave_server if there are slave servers being used, which is assumed if there are more than one.

- Patch #512108 by boombatower: added a warning to educate people about the 'Clean environment' button when test run fails.