Updated full ISS model with handrails

This release provides three large files. Stage_55-6_v11_nohandles.stl is an updated model of ISS. Stage_55-6_v11_handlesonly.stl provides the handrails to be added to that model. handrails.zip has the handrail models as separate files saved relative to the SSREF frame (so the handrail names can be applied).

EVA Nav project definition with full ISS model

This is the first release of this repository. This repository currently does not contain the software to run the application, but it contains the overview information, requirements, and sample data including a full model of the ISS (Stage_54-6_v5.stl).