add files from previous project

This is not working yet, this is just to add some structure to the project.
work in progress
work in progress
work in progress
work in progress
work in progress
work in progress
refactoring (everything)
Merge branch 'feature/make-it-work' into develop
Merge tag 'v0.1' into develop

v0.1
Merge branch 'release/v0.1'
add support for next piece preview
use official colors for tetrominoes
fix wrong shape for J piece
Merge branch 'feature/various-fixes' into develop
detect end of game

basic game over screen
basic scoring support
css tweaks
display score in game over screen
add pausing feature