Adding support for Geogebra files in KIG

by Aniket Anvit for KDE

Both KIG and Geogebra are popular applications for Geometry learning. Despite the fact, that both have been designed to serve the same purpose and are very similar in features/functionality, currently Geogebra worksheets cannot be opened in KIG. My project aims at providing support for Geogebra native format in KIG enabling users to open Geogebra worksheets in KIG.