added welcome screen to Stargazer (fixes #60)
stop pushing non-core design docs to tabcat-data
require TabCAT and CouchDB to agree on which user is logged in
add some rounded corners to tasks.html
layout adjustment on "welcome, stargazer" screen
Merge pull request #71 from davidmarin/welcome_stargazer

Add a welcome screen to stargazer (fixes #60) so that patients aren't immediately bombarded with comets.

Also stop pushing non-core design docs to tabcat-data (fixes #65), handle an edge case where CouchDB and TabCAT don't agree which user is logged in, and make tasks.html slightly prettier.