Design changes - Membership page

Tweaks to membership page:
* membership page now has email sign up for everyone tier - still needs
real link
* put dashes in where benefit not applicable at that tier.
Newsletter sign up link

Now with the right sign up link
Style changes to fix bottom boxes and header lines
Merge pull request #20 from theodi/Design-changes-per-@agentgav

Design changes per @agentgav