v3.0-M2 Improved assignments for part 1 ready for test

The following improved assignments in study period 1 are ready for test:

• Update exercise objects to depend on [https://github.com/lunduniversity/introprog-scalalib]
• Update lab blockmole to depend on [https://github.com/lunduniversity/introprog-scalalib]
• New exercise classes with preparations for new lab blockbattle
• New lab blockbattle that expands lab blockmole from singelton objects to classes

Help is wanted on evaluation of:

• Does the exercises objects and classes prepare well for the labs blockmole and blockbattle respectively?
• Are the exercises and labs lagom challenging for a beginner?
• Is there enough tips and recommendations in lab classes?