Added Geomedia compatibility to the 64-bit version of Digi3D.NET

We just added Geomedia support to the 64-bit version of Digi3D.NET. Until now the 64-bit versions of Digi3D.NET could not establish a database connection with Microsoft Access files but from today they can, so we have made the 64-bit installer install the Digi21.IO.Geomedia component that is the importer/exporter of Geomedia files. This will cause that starting next week we will have two different installers: the installer for the 64 bit version, and the installer for the 32 bit version. Until today, when installing the program, both installers were installed simultaneously, because the 64-bit version could not open Geomedia files. Having both versions installed simultaneously caused a logistical problem with the public assemblies for third-party programming in .NET, because they have the same name (Digi21.DigiNG, Digi21.DigiNG.Plugin, etc.) regardless of the installed version 32 or 64 bits, which could cause problems. From next week, either the 64-bit version or the 32 version is installed, but you can not have both versions installed simultaneously to avoid this type of problems.