Fix race condition in disk-backed datasets

When using TaggedImageStorageMultipageTiff, retrieving an image by
getImage() could return invalid data, or throw, if the image had just
been added via putImage() and the write to disk had not completed.

git-svn-id: https://valelab.ucsf.edu/svn/micromanager2/trunk@14670 d0ab736e-dc22-4aeb-8dc9-08def0aa14fd
ASIdiSPIM: accounted for delay in beam position due to card's Bessel filter

git-svn-id: https://valelab.ucsf.edu/svn/micromanager2/trunk@14671 d0ab736e-dc22-4aeb-8dc9-08def0aa14fd