XMAP: Added protection to number of detector elements. Changed xmap
start to erase/start.
Changes made on i18. will be merged to 8.30. then master
Trajectory - removed vasanthis "useAlternateMethod" which was unnesecary
, misleading and alternate could have meant anything.
Merge remote-tracking branch 'origin/8.30.b18' into 8.30
Merge remote-tracking branch 'origin/8.30.i18' into 8.30