use the right link to the login page in a particular use case: clicking activation email when not logged in
fix up styles in header for this particular use case
Merge branch 'master' of github.com:edx/edx-platform into fix/cdodge/bad-link-in-activation-email
add simple content check for the activation page when the user is not logged in
Merge pull request #18 from edx/fix/cdodge/bad-link-in-activation-email

[STUD-177] Fix/cdodge/bad link in activation page