Issue #2248009 by twistor | djdevin: Fixed Remove the population of ->source_config from FeedsPlugin.

Issue #1033202 by jamesdixon, jamsilver, twistor, james.williams, Steven Jones, vordude, j0rd, mErilainen, gmario, rickmanelius, imclean, dasjo, guillaumev, jlyon, gilgabar, elliotttf, mukesh.agarwal17, patcon, wesnick, Bevan, kreynen, Grayside, fago, spotzero: [Meta] Generic entity processor.

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

- 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.

Add sourceSave() and sourceDelete() methods notifying plugin implementers of a source being saved or deleted. Minor cleanup on sourceForm().