extract  stores processing method

by doing so we'll be able to call process_stores outside
the save codepath and without opening a transaction.
saving attachments
Revert "saving attachments"

This reverts commit 3b2253b5b537d70dc65600f22121314d10cd468a.
creating temp_data
better naming. tks @osheroff
Merge pull request #4 from zendesk/marcosvm/stores_take_3

extract  stores processing method