revert websocketsharp to old version, new version breaks *nix builds
Revert "revert websocketsharp to old version, new version breaks *nix builds"

This reverts commit 8b4792a273dac2c9110cbf85dc27b2ac75bcd2b9.
Merge branch 'master' of https://github.com/MediaBrowser/MediaBrowser
Merge branch 'master' of https://github.com/MediaBrowser/MediaBrowser
made mono compilable again
Merge branch 'master' of https://github.com/MediaBrowser/MediaBrowser
Merge pull request #922 from gsnerf/master

fixes for mono build