Issue #1058424 by thijsvdanker: Port date mapper patch to d7 version to support dates before 13 Dec 1901

Issue #1537776 by David_Rothstein | RyFo18: Importing a single 21st century year defaults to the current year.

Issue #1843146 by twistor: Add pluginType() method to be able to determine the plugin type without having to lookup the inheritance.

Issue #1728634 by David_Rothstein: Fixed User and node 'created' dates (from feeds_to_unixtime()) default to the wrong timezone.

Issue #1110762 by vaartio, franz, bancarddata, axel.rutz: Fixed Feeds does not catch file exceptions properly in file mapper and FeedsParser.inc getFile() function.

mapper: URLs with spaces not parsed properly.

importing a single year.

Issue #1055582: Fixed strict notice that FeedsDateTime::setTimezone() is not compatible with DateTime::setTimezone().

If file is not to be copied, check whether file already exists, as file_save() won't do that for us (compare file_copy() and file_save()).

- DRUPAL-7--1-0-alpha2 http://github.com/lxbarth/feeds/tree/DRUPAL-7--1-0-alpha2
and
- DRUPAL-7--2-0-alpha1 http://github.com/lxbarth/feeds/tree/DRUPAL-7--2-0-alpha1

  language, user properties from parent feed node. Note: Signatures of
  FeedsProcessor::map(), existingItemId(), FeedsParser::getSourceElement()
  changed.

#840350 lyricnz: (Optionally) Transliterate enclosure filenames to provide protection from awkward names.

#783820 klonos: Fix warning: copy() [function.copy]: Filename cannot be empty in FeedsParser.inc on line 168.