ASIdiSPIM: fixed bug introduced by having default number of sides be two; also catch missing camera error before calculating timings so we give better error message to user

git-svn-id: https://valelab.ucsf.edu/svn/micromanager2/trunk@14224 d0ab736e-dc22-4aeb-8dc9-08def0aa14fd
Reverse the slice order, so that the image stacks immediately overlap.  Therefore, no rotation is needed in Mipav

git-svn-id: https://valelab.ucsf.edu/svn/micromanager2/trunk@14225 d0ab736e-dc22-4aeb-8dc9-08def0aa14fd