ENH: Adding AIM output support as a cmake option to LesionSegmentation.

This will allow users to output results as slice-by-slice contours as
well as a scalar volume to be used with any application that supports
the AIMv2 standard.
ENH: Adding a way to read a seed point and bounding box from a file.

This will allow the direct input of Location Files per the QIBench project.
ENH: Aligning with the new Location File conventions.
ENH: Accounting for Loc files have a header.