Release v0.5 (blender 2.8 support)

Added automatic rendering engine selection based on the .blend file to avoid incompatibility caused by BLENDER_RENDERER only being available in <2.8 and EEVEE introduced in >=2.8.

Release v0.4

• Merged some additions from @RedRaptor93
• Added drag & drop for project files
• Modified audio mixdown workflow

Update by MeTwentyFive

@MeTwentyFive very generously made this application more convenient and fixed some bugs, so I am now publishing it through this release system as suggested by him and @KrisZane.