Don't auto select the 0 card
Improve the styling of the website
Disable vote button when the vote is invalid
Change styling of session panel
Fix color of card border
Merge pull request #280 from TheTeam8s/bug-website

Bug website
Remove duplicate users and correct styling of success message for deck votes
Merge pull request #281 from TheTeam8s/bug-website

Remove duplicate users and correct styling of success message for deck votes
Filters out requirements in other sessions
Add test for requirement selection panel. Puts requirement selection
panel in planningpoker.view.requirementselection.
Test filtering requirements in sessions
Add test for filtering requirements. Comments out print statements in
requirement selection panel
Added more tests of the requirement selection panel.
Fix info panel setRequirement.