added class TA2AccessSQL (only generic, no work is done there yet)
Getter for RunNumber added in TA2AccessSQL
TA2BasePhysics is derivated from TA2AccessSQL now (included SQL Access in BasePhysics)
added simple TA2RootTree (under development)
changed order of TA2Particle Members (needed for TRootTree Output)
actual work (need to be amended later)