Initial files for my tetris clone.

- Development has already started in main.c.
- little_specs.txt contain an overall shallow specs for the game and its
implementation. It won't be updated anymore. After significant work, maybe
another one will be writen.
- The arcade font is a free to use font, from here
http://www.dafont.com/pt/arcade-ya.font
Merge branch 'master' of https://github.com/phao/tetris