Switch to gorilla/websocket

garyburd/go-websocket is marked as deprecated in favor of
gorilla/websocket. The changes are quite minimal.
Switch back to rcrowley/go-metrics

The incompatibility with Windows has been fixed by this pull request:
 https://github.com/rcrowley/go-metrics/pull/8
Merge pull request #79 from vincentbernat/fix/rcrowley-go-metrics

Switch back to rcrowley/go-metrics
support the dashboard websocket being tunneled over tunnels
merge master
Use go-bindata from github.com/jteeuwen

It is now able to recursively walk into directories and is also able to
generate the debug version of the assets. Therefore, we remove the
manual version of the debug version and use the generated one instead.
reinstate release-client and release-server targets
fix synchronization error in lrucache's loaditems
Use go-yaml-v1
Fixed another typo 'tlsCert' to 'tlsCrt'
Merge pull request #96 from fcarriedo/master

Fixed typo 'tlsCert' to 'tlsCrt' in docs
Merge pull request #95 from mattn/go-yaml-v1

Use go-yaml-v1