Refactored intro level.
Fixed collision with pillar in intro.
Refactoring and enhancements of chap1. #15
Refactoring and enhancements of chap2. #18
Removed useless Test and experimental levels from code.
Factorized findMessage methods.
Made objects solide in chapter 1 & 2.
Refactoring of chap3 + enhancements.
Added dagfin's warp/death animation. #16
Added zombie_warp.png. No code yet.