StiIstDetectorBuilder: Added flag to build ideal IST geoemtry
StiIstDetectorBuilder: We need to set the current gGeometry path before extracting any info about current volume position
StiIstDetectorBuilder: Yaping's changes
Merge branch 'ds-ist'
Updated in accordance with the nee pileup trees stucture.
Updated the instructions.
Fixed style with astyle -s3 -p -H -A3 -k3 -O -o -y -Y -f
Do not use additional margin/edge for HFT volumes. I assume that to some extent the projected track error should prevent losses of hits in active volumes. This change was not tested properly. I don't know how it may affect track reconstruction with SVT
StiDetectorContainer: Removed method that is not used or defined anywhere
Sti/*: Style and cleanup changes
Sti/StiKalmanTrackFinder.cxx: Doxygen