Date iCal 3's use of the Libraries APIs was slightly less awful than 2's, but it
would still fail to properly detect an incorrectly installed iCalcreator.

Because OSX uses a case-insensitive file system, git didn't pick up the change
I made when I re-wrote the parser. In retrospect, I probably should have chosen
a totally new name for the feeds parser, but the existing filename *was* the
most appropriate name for the new class, just with different capitalization.

Renamed hook_date_ical_import_calendar_alter to hook_date_ical_import_vcalendar_alter, to match the export hook.

Also did some minor refactoring and comment editing.

Date iCal 3.0 is nearing completion! The only major task remaining
is to write the migration code.

iCal feeds are now parsed in batches of 50 (by default).

The Date parser code has been significantly improved, removing the
old limitation of needing to parse DTSTART first, and also covering
more edge cases and error conditions.

I hadn't yet tested the RRULE import code when I first pushed Date iCal 3.x-dev,
but now I have. It's much more robust than it was in 2.x.

In addition, I moved the parsing class out of DateiCalFeedsParser.inc and into
libaries/ParserVcalendar.inc, which is like how Feeds' own CSV parser is set up.

This new version is still in a state of partial completeness. You may need to do
some manual fixing to get it working, due to a change I made in the classes
offered by this module. Try 'drush cc registry' if 'drush cc all' fails.

Please note that ALL of the hooks exposed by Date iCal have changed. They do
essentially the same things they used to do, but they're named differently.

The big change is that the Feeds plugin has been completely re-written to
conform to the Feeds APIs. It's now much more resilient and powerful. Feeds
Tamper will now work, and is in fact the prescribed way to alter data, since I
removed several alter hooks.

Issues [#1931020] and [#1935820]: Allow custom fields for summary. Fix repeating events causing duplicates. Add @file to DateIcalFeedsParser.inc

Applied patch #11 from [#1922658] to get around iCalcreator limitation with stream wrappers. Also made the amount of whitespace on blank lines consistent throughout the project.

Includes patches from issues 1895396 and 1462646.
Updated the README and the CHANGELOG.