v0.1.5

Changelog:

• fixed an issue where FEZUG could crash in multithreaded mode (thanks @thearst3rd)
• added volumeinfo command (thanks @admoore0)
• added camera viewpoint to the text hud (also thanks @admoore0)
• added new console variable system with automatically saved variable config file
• implemented commands to control HUD elements (position and their appearance)
• fixed issue with console not handling new line characters properly
• refactored the project to target .NET Standard 2.0 and simplified the workflow