move css to separate file
add vim modeline
Merge pull request #9 from seletskiy/refactor-css

move css to separate file
Merge pull request #10 from seletskiy/vim-modeline

Vim modeline
#11. UI improvements. Controls hided in play mode.
#11. Fixed double speed error after page reload in play mode.
Fix #11. Fix #12. Improved speed control.