Documenting adding a slug redirect when merging people
Update south_africa_import_constituency_offices to use requests 1.0 api

The json property became a method in 1.0.0
https://github.com/kennethreitz/requests/issues/1028
shinyoureye: add a background image requested by EiE to every page

This is as a result of some email correspondence with EiE who
have requested a background image on every page.  This commit
introduces the original image they requested
(mz-nigeria-background.jpg) and the "watermark" version,
generated by Jedidiah Broadbent, which should be less distracting
when trying to read text overlayed on it
(mz-nigeria-background-watermark.jpg).
shineyoureye: Remove a white bar from the top of every page
shineyoureye: improve list display of positions

The even lines in the position list page previously had a transparent
background, which looked strange since the odd ones had a solid white
background.  Instead, use an off-white colour as the background for
the even lines.
remove trailing whitespace
New management command to report bad slugs
Create new shell script to run management commands
Replace existing single purpose scripts with the new 'run_management_command' one
Run the slug checker daily to catch bad slugs
Correct path to the sample South Africa Popolo data
Ensure that the values stored to slug fields are all slugified
Add an include_name_to_use option to Person.additional_names

This commit also includes tests for the various name-related
methods.
Add a method to return a set of all known names for a Person
Add an Django admin command to merge two people

This replaces a series of manual manual steps which you used to
have to perform if you ended up with duplicate people in the
database, for example after a big data import where names are
ambiguous.

Thanks to Edmund von der Burg for reviewing this code,
providing a fix and suggestions for improvement.
Remove manual merge steps in favour of using the management command
Merge branch 'merge-people-command'

Conflicts:
	pombola/core/models.py
Create import script for basic CSV containting positions
Initial data for the kuvakazim.com site
Zimbawe specific notes