Implement vendor-specific image reorientation

[davidmummy]

Different vendors write their data differently to the MRD file, resulting in the orientation of images having different coordinate systems after processing.

Desired functionality:

• Read the scanner_type from the MRD file (philips, ge, siemens)
• Implement the correct sequence of flips and rotations for each vendor so that the results are in the same coordinate system across sites (i.e. the standard Duke system). We can just base this on our current test data from Cincinnati and Iowa.

This is ready to work at your convenience.

[davidmummy]

Closing this issue as we will combine it with the Complex Conjugate issue #59 , since they are both interrelated (complex conjugate apparently affects orientation).