[#159] Use thumbnail for partner site map popup

The map of projects on the partner sites home page uses the original
image in the popups dispayed when you click a pin.

Fix by using the named thumbnail "map_thumb" instead.
Release notes Fix for #272
[#387] Move InternalOrganisationID to its own admin form

Remove InternalOrganisationIDInline and its use in OrganisationAdmin

Add InternalOrganisationIDAdmin
[#230]Add admin instructions; only emit link if defined
Merge branch 'feature/230_fb_appid' into develop
Fix for #142
Merge pull request #399 from akvo/142-footer

Fix for #398
Merge pull request #377 from akvo/372-ac-releasenotes

Release notes Fix for #372 - Spelling is now just right
[#230]Improve admin help
Merge branch 'feature/230_fb_appid' into develop
Merge branch 'develop' of https://github.com/akvo/akvo-rsr into develop
[#230]Like button signup link misbehaves when not logged into FB
Fixes for #401
Merge pull request #369 from akvo/feature/ps_map_popup_fix

[#159] Use thumbnail for partner site map popup
All thumbnails now work the same way
Update RELEASE_NOTES.md
Update RELEASE_NOTES.md
Merge pull request #403 from akvo/2.3.2releasenotes

2.3.2 releasenotes
Merge pull request #400 from akvo/feature/230_fb_appid

[#230]Like button signup link misbehaves when not logged into FB
Merge pull request #388 from akvo/feature/387_fix_slow_org_admin

[#387] Move InternalOrganisationID to its own admin form
[#350] Fix footer links

Fix donation policy link.

Fix API code of conduct link.