Add trace streaming.
Create Tracer.
Use environment variable to determine Trace server.
Merge branch 'master' into TraceByPipe
Fix: enable deletion of traces. Add trace coloring.
Merge branch 'master' into TraceByPipe
Integrate jchart2d into Tracer project.
Merge branch 'master' into TraceByPipe
Create High Pass Filter.
Create parameters for filtere angle and gyro data.
Bug: initialize local variables!