First cycle course, v1.2

Adds guest lecture to study guide.

First cycle course, v1.1

Minor improvements:

• adds (initial) examgen support
• adds release build-system
• changes lecture for appliedcrypto module, crypto+hashsign -> overview
• restructures code for studyguide
• updates submodules

Second cycle course, v1.0

Minor differences to internal repo.

First cycle course, v1.0

Minor changes from internal repo.