Fixed to document and file tidy

1) Remove reduant path form .gitignore
2) Fexed typo in code edits for demo
3) Fixed files formats in snakes game running dos2unix
4) So removed dos2unix call in Makfile
5) Updated games.tar.gz in dropbox as well
6) Fixed clean target in makefile and .SUFFIXES
7) Made use a branch<n> variables instead of literal branch names