Merge pull request gravitational#831 from gravitational/rjones/bump-r…

…elease

Bumped release.

Merge pull request gravitational#796 from gravitational/alexey/css-fixes

(web) css fixes

Web session lifecycle fixes

fix ssh agents

interface for web sessions

fix proxy login for API clients

interfaces and fixes

Internal testing release

Fixed bug gravitational#687

zip-based implementation of http.FileSystem did not have `http.File::Seek()`
implementation.

Merge pull request gravitational#651 from gravitational/ev/1.3

U2F defaults