Particle and Track work plans for 2011
 ---------------------------------------------------

Particles:
----------
 * code review
 exceptions, warnings, arguments of methods (const or non-const objects, pointer, reference or object)

Track:
----------
 * New scheme for GetVelocity
 Velocity is defined as a member of G4Track and is given by processes via particle change,
 to solve the problem that G4Track::GetVelocity method is invoked many times per step.
 * Review flags in tracking (ex. ged rid of ConditionallyForced) 
 * code review
 exceptions, warnings, arguments of methods (const or non-const objects, pointer, reference or object)
 * Design a scheme for more precision for tracking in time
 (cooperation with transportation)