Finished up the Reflectivity model, added fields for the user input. Fixed NatTable bug and File IO bug.

Merged Eclipse Webmaster requested to merge github/fork/KasperGam/jay/reflectivity into jay/reflectivity

Created by: KasperGam

Close to done on the model, needs tweaks and aesthetic improvements (custom button icons, etc.).

Fixed bug 471454, bug 471457, bug 471003.

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