[#415] Add find_benchmarknames_and_BUs() to pre_upload.py

find_benchmarknames_and_BUs() replaces the CSV file previously used for
importing new benchmarknames and linking them to the Cordaid business
unit's categories.

Also remove a debug break point from cordaid_project_upload.py
[#415] Remove debug break point
[#415] Add set_publishing_status() to post_import.py

set_publishing_status() sets the PublishingStatus of the imported
projects using the iati-activity@akvo:publish attribute.

Also change the status output when running the script so that successful
events are shown as "." and errors as "*".
[#415] Add counter to processing output
[#415] Fix current_image_credit and target_group imports

Add XSLT to populate the Project.target_group field

Fix loading of Project.current_image_credit in post_import.py. The
attribute has changed name in the XML.
Merge branch 'release/candidate'

This merge includes only fixes to the Cordaid XML import scripts