Late tomorrow (PST), we'll be releasing a new build. The server will be down for about an hour while we deploy the build. This build will have a number of fixes and optimisations in it. You can find a preliminary list here:
http://forums.cardhunter.com/threads/test-build-3-39-0-17-july-2015.7553/
Included will be the ability to set a password for an account you created via Steam so you can login via our web client. There will be a new co-op chat channel and a lot of optimisations and tweaks that should help improve performance (lag).