Use medium log format

Yields the necessary "Date: " format.
Closes #34
Limit the # of links allowed in event description

Closes #32
Fix typos in too many links flash
Merge pull request #35 from jc00ke/fix-git-log-format

Use medium log format
Merge pull request #36 from jc00ke/limit-number-links-in-desceiption

Limit the # of links allowed in event description
Fix too_many_links checking when updating events

The spec wasn't actually testing the update action, and the update
action hadn't updated @event at the time of the check, leading to
some confusion.
Fix events/_item for events with no end time

We don't actually require end times on events, though our form strongly
encourages it. The recent update to add schema.org markup assumed that
end_time would always be present. This was a fairly safe assumption, 
given that we haven't noticed it in production until now. :)
Merge pull request #38 from reidab/fix_event_show_with_no_end_time

Fix events/_item for events with no end time
Merge pull request #37 from reidab/fix_too_many_links_on_update

Fix too_many_links checking when updating events
Release v0.20130717 (and others)

Baked a new release v0.20130717:
  * [DEPENDENCY] Upgraded to rails 3.2.13.
  * Fixed #30: Relax markdown emphasis parsing to avoid adding emphasis to words_containing_underscores.
  * Fixed #22 and #33: avoid double-output of cache block for filtered events.
  * Fixed #35: Use 'medium' git log format for footer version number.
  * Fixed #36, #37: Limit the number of links in event descriptions to three.
  * Fixed Google Code issue #280: Strip whitespace from venue fields.
  * Fixed #38: Fixed display of events with no end time
  * Added Schema.org support to event markup.
  * Updated spam blacklist.

Also, manufactured tags and wrote release notes for past stable releases
that were never officially tagged or released.
Fixed version typo in CHANGES.md
Lock nokogiri to 1.5.10 to maintain 1.8.7 compatibility
Fix squash_many_duplicates routes

They were named incorrectly as squash_multiple_duplicates
Fix events_controller_spec to work use valid routes and verbs
Use correct POST verb for sources/import
Remove the Rails default route

Fixes #19
Merge pull request #19 from reidab/without_default_route

Remove default route
adds microformats-2 classes to single event pages
adds microformats-2 classes to both list views
updates tests of time range helpers for new microformats2 markup