make submit_forms_locally more flexible

  - allows you to pass in kwargs that get passed on, e.g. received_on
  - does not force attachment to be {}; this is the default anyway
  - does not force auth_context to be DefaultAuthContext()
Added incomplete and saved form configuration
Update commcare-settings-layout.yaml
Image resizing
resize images
make saved/incomplete/resize preview-only
remove force_closed tests because force_close is used nowhere
Merge pull request #2314 from dimagi/submit_forms_locally

make submit_forms_locally more flexible
Merge pull request #2316 from dimagi/show-saved-incomplete

New CommCare Settings: Incomplete, Saved, Resize
Merge pull request #2317 from dimagi/remove-force_closed

remove force_closed tests because force_close is used nowhere
basic fixture model migration
modifies a fixture couch-view for attribute support
renaming fields method
modifies report-filters-using-fixtures to attribute-fixture-filters
modifies custom-apps-filters to be compatible with fixtures-attributes
modifies Fixtures upload for attributes
casting ints from excel to strings to store in couchdocs
better exception handling
fixture api better upload exception
fixtures style changes from review