CHG: move sliceTime tags one level up in XML tree


git-svn-id: https://www.nitrc.org/svn/cmtk/trunk@5214 42a5c34f-2066-0410-bec5-ba365beb4995
DOC


git-svn-id: https://www.nitrc.org/svn/cmtk/trunk@5215 42a5c34f-2066-0410-bec5-ba365beb4995
ADD: normalize all slice times to 0 (this should accomondate cumulative times recorded, apparently, in some GE files)


git-svn-id: https://www.nitrc.org/svn/cmtk/trunk@5216 42a5c34f-2066-0410-bec5-ba365beb4995
ADD: RTIA tag on GE for slice times, if properly set


git-svn-id: https://www.nitrc.org/svn/cmtk/trunk@5217 42a5c34f-2066-0410-bec5-ba365beb4995