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Erlang programming book is not free!

Update free-programming-books.md
Erlang programming book is not free!
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 ###Erlang
 * [Learn You Some Erlang For Great Good](http://learnyousomeerlang.com/)
-* [Erlang Programming](http://it-ebooks.info/book/325/)
 * [Programming Erlang](http://www.e-reading.biz/bookreader.php/139986/Programming_Erlang.pdf)
 * [Concurrent Programming in ERLANG](http://www.erlang.org/download/erlang-book-part1.pdf)