Update PopIt website

There's a redirect already but this seems to be the new canonical URL.
Adding link to committee descriptions
Merge pull request #33 from MyfanwyNixon/patch-1

Adding link to committee descriptions
Merge pull request #31 from henare/patch-1

Update PopIt website
Updated index.html
Updated index.html
Updated index.html
add and fix permalinks
Merge pull request #36 from ciudadanointeligente/permalinks

add and fix permalinks
Solving conflicts with gh-pages