I’ve manually compiled MGCB for linux and added/changed some code for Fonts and 3D Models to work. I’ve also added a GUI tool called “ContentProcessor.exe” so that you don’t have to compile from terminal.
Link to download: https://mega.co.nz/#!qAwBCBaZ!msP736fZGQNI3PeHUyQtbIRT3jriFXMd3Tv0UoSzb5U
PS. To use 3d models from blender, download blender from the website, open it, go File > Export > Autodesk FBX, on the left panel select FBX 7.4 binary as version and export it wherever you want.