Fix #56 (please test)
Correct commata in Level.tex
Improve consistency of schedule
Shorten section 2.2.2 and remove TODO
Remove splash screen
Release resources of loading screen correctly
Use logical predecessor where possible
Apply some changes to introduction
fix Casing in convert.tex
Correct Spelling in levelspec
Correct spelling in persistence_manager.tex
Improve Spacing in achievement test
Replace initilize with initialize and improve spelling in achievement test
Fix spelling in level.tex
Add text to level.tex
Fix spelling.
Fix spelling.
Small change to improve consistency
Add sentence to criteria.
Correct grammar in board test