Oct-converter

This minor update allows for specifying the number of columns and rows in a volume when reading .img data

This release makes improvements to the Zeiss Dicom reader.

- The reader now attempts to distinguish between OCT and Fundus data, and returns both.
- The reader can now extract image data from files it previously failed on.

Adds support for reading Zeiss' obfuscated Dicom format

Fixes a bug in v0.3.0 that prevented imports

Updates include:

- Contours (layer segmentations) are now extracted from .e2e files.
- Acquisition date is now extracted from .e2e files.
- Initial support for reading Optovue OCTs
- Laterality is now extracted separately for each OCT/fundus image for .e2e files.
- More patient info extracted from .e2e files (name, sex, birthdate, patient ID)