reorganization of conversion to allow for scripting
tweaks to read_only implementation and prompts for overwrite
added support for converting v0 HDF5 datasets, not complete
adding savedir setter, moving all overwrite directory checks here
work on v0 to v1 conversion
bug fix in sequence.py
reorganized saving upon initialization.
adding move_pkls to savedir setter
Merge pull request #37 from nbdanielson/v0_conversion

v0 conversion and savedir reorganization
3D volume pyramid alignment
Sequence support for frame-specific displacements