Redirect take-part index to get-involved anchor
Redirect take-part index to get-involved anchor

Also clean up the routes a bit because resources is no longer useful.

https://www.pivotaltracker.com/story/show/50252905

ggoral/whitehall,robinwhittleton/whitehall,alphagov/whitehall,YOTOV-LIMITED/whitehall,alphagov/whitehall,robinwhittleton/whitehall,ggoral/whitehall,alphagov/whitehall,askl56/whitehall,hotvulcan/whitehall,askl56/whitehall,ggoral/whitehall,YOTOV-LIMITED/whitehall,YOTOV-LIMITED/whitehall,YOTOV-LIMITED/whitehall,askl56/whitehall,hotvulcan/whitehall,hotvulcan/whitehall,ggoral/whitehall,alphagov/whitehall,hotvulcan/whitehall,robinwhittleton/whitehall,robinwhittleton/whitehall,askl56/whitehall