Updated text
Russian additions and Spanish corrections.
Merge pull request #43 from galcalde/master

[es] corrections to cases 17 and 18
[IT#159] Add case
Merge pull request #44 from galcalde/master

[es] Cases 19 and 20
Merge branch 'master' of ssh://github.com/alessandro1997/the-codeless-code
Merge pull request #45 from galcalde/master

[es] Cases 21 and 22
Merge pull request #46 from galcalde/master

[es] Cases 23 and 24
Merge pull request #47 from galcalde/master

[es] cases 25 and 26. And small corrections to cases 18 and 20
Merge branch 'master' of ssh://github.com/alessandro1997/the-codeless-code
Updated text
Added Russian translation
Merge pull request #48 from galcalde/master

[es] Cases 27 and 28
[IT#160] Add case
Merge pull request #2 from alessandro1997/master

update 2