fix sidebar height problems. fixes #264
Merge branch 'play' of github.com:Graylog2/graylog2-web-interface into play
disabled local admin user for preview release

it is useless until we have the ability to change the web interface config from within the browser and needlessly confuses people
use SHA2 for passwords, display correct message when unauthorized

fixes #137, #256
remove local admin user config until we need it again.
Merge git://github.com/Graylog2/graylog2-web-interface into develop