feeds 6.x-1.0-beta3

This release most importantly fixes update behavior for node processor. Upgrade from any previous versions strongly recommended.

• #854628 DanielJohnston, alex_b: Fix user processor assigns all roles.
• #838018 infojunkie: Mapper for Formatted Number CCK field. **Experimental, likely to be removed soon: #857928: Breaks installation profiles**
• #856408 c.ex: Pass all $targets for hook_feeds_node_processor_targets_alter() by reference.
• #853194 andrewlevine, alex_b: Mapping: don't reset all targets.
• #853144 alex_b: Consistent use of "replace" vs "update".
• #850998 alex_b: Clean up file upload form. Note: If you supply file paths directly in the textfield rather than uploading them through the UI, you will have to adjust your importer's File Fetcher settings.
• #850652 alex_b: Make ParserCSV (instead of FeedsCSVParser) populate column names.
• #850638 alex_b: Introduce FeedsSource::preview().
• #850298 alex_b: ParserCSV: Support batching (only affects library, full parser level batch support to be added later with #744660).
• Minor cleanup of admin UI language and CSS.
• #647222 cglusky, jeffschuler: Specify input format for feed items.