Add virtual-world-framework organization to site

The virtual world framework is being developed for use by the different branches of the armed forces and is funded by the US Office of the Secretary of Defense. See the FAQ page for more info: http://virtualworldframework.com/web/faq.html
Added yourmapper as civic hacker
Update _config.yml
Update _config.yml
whitelist gh-pages and all branches
adds CodeandoMexico to _config.yml
Moves CodeandoMexico org to Civic Hackers list
edited for accuracy and clarity
Update _config.yml
Migrate @laurawesley's changes

Fixes an odd Prose bug, see #96.
Add ODI to civic hackers list
implement @nschonni edits to WET story
Merge pull request #109 from github/laurawesley-prose-patch-1

WET article tweaks
Change # of streets
edit streetmix post #116
Merge pull request #114 from theodi/gh-pages

Add ODI to civic hackers list
add yourmapper
Add Prose default metadata
addd datagovuk
Merge pull request #51 from VilleDeMontpellier/patch-1

Update _config.yml