add ErlideEvent and ErlideEventTracer classes
add FileEventTracer
fix event file format
add tracing for completion operation
remove static access to ErlangEventTracer
move event tracer to utils plugin, so that we can trace non-eclipse stuff
better handling of error in scanner
separate start and end events for operations
add tracing for text editor action
small adjustments
remove FileEventTracer, just use ErlideEventTracerHandler
Merge branch 'feature/stats' into pu
change default time for code assist activation to 50ms (from 100ms)