Fix "Save and Continue editing" button wrong redirect path

Add post_url_continue='../../%s/' arg to self.response_add method. Now "Save and Continue editing" button works great - save and redirects to object editing page as expected.
Saves ImageFiles paths from original object
Russian localization files
Update version number
remove force_text import
change=False

According django source code:
``change`` is True if the object is being changed, and False if it's
being added.

Our object is added on save.
Also removes delete button in clone view.
Merge remote-tracking branch 'applecat/master'
tests: fix assert, it was testing the opposite!
tests: add test for the fix to "Save and Continue editing" redirect from commit 5150772
tests: add test for saving ImageFile paths from original object from commit 282873f
clone view: saves ImageFields paths from original object. Same behavior as 282873f for ImageFields