bug fix in micros(); update config.h

git-svn-id: http://openxsensor.googlecode.com/svn@34 90973d50-1f1b-0509-0770-70c39df98553
bug fix in micros() ; update config.h

git-svn-id: http://openxsensor.googlecode.com/svn@35 90973d50-1f1b-0509-0770-70c39df98553