v2.0.0-rc4

This is the final release before CubeKit v2.

I've done lots of planning already for CubeKit v3, and development is already underway in secret!

What's Changed

• Fix: Commented out merged dictionaries in GlowUI by @Lamparter in #120
• Feature: Added SystemInformation and associated helpers by @Lamparter in #121

Full Changelog: v2.0.0-rc3...v2.0.0-rc4