Add logs to Logs page (#151)

* Add websocket connection

* Add logs to the log page

* Make debug color more readable

* Remove TODO from front page

* Put all log entries in latest first order

* Add filtering of log entries by level

* Limit log entries and throttle updates

* Fix logger not throttling broadcasts

* Remove now unnecessary UI-side log throttling

* Filter incoming logs by log level

* Make log view more terminal-like

graphql/documents/data/log.graphql

@@ -0,0 +1,5 @@
+fragment LogEntryData on LogEntry {
+  time
+  level
+  message
+}