Annotate the SpeedTracer log data with some extra info.
Also, remove some unused event types and fiddle with the colors to make DevMode traces a bit more readable.

Review at http://gwt-code-reviews.appspot.com/753801

Review by: zundel@google.com

git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@8519 8db76d5a-ed1c-0410-87a9-c151d255dfc7