Merge pull request #1 from Bryukh-Checkio-Tasks/master

Updates
remove commented css rules
cleanup description
add message about cases
add tests
fix typo in test
fix wrong test
rename cow_say to cowsay for consistency with console tool
fix cowsay in js
add precondition
add more tests
update description
add_dead_cow
Update task_description.html

Little cosmetic and grammar.
Merge pull request #4 from Bryukh/patch-1

Update task_description.html
russian translation
fix precondition
moved ru folder
grammar and format
icons