Merge pull request #7 from ymn/master

Fixed typos in chapters 1 - 5
Merge pull request #8 from ymn/master

Fixed typos in chapters 6 - 10
type error in ru/03/Programming_Erlang_Ch03.md
Merge pull request #9 from valyukov/patch-1

type error in ru/03/Programming_Erlang_Ch03.md
Update ru/03/Programming_Erlang_Ch03.md
Merge pull request #10 from Jugastrov/patch-1

Update ru/03/Programming_Erlang_Ch03.md
Экспортировал MD в PDF

Для удобства читателей
Update ru/02/Programming_Erlang_Ch02.md
Merge pull request #11 from crmaxx/master

Added missed comma in chapter 2