ASIStage: added new property "Use Fast Sequence" that cuts out all commands sent to controller during acquisition.  Idea is to speed up repeated sequence events, e.g. if multiple Z-stacks are collected there is ~0.5s delay because of serial traffic

git-svn-id: https://valelab.ucsf.edu/svn/micromanager2/trunk@14412 d0ab736e-dc22-4aeb-8dc9-08def0aa14fd