Books from hackershelf; created Russian list

I also fixed line with 'mod_perl', because underscore in Markdown
means emphasis and it continues at the rest of the file (at least in
vim).
Merge branch 'master' of https://github.com/vhf/free-programming-books
Fix missing spaces
Merge pull request #158 from JIghtuse/master

Books from hackershelf; created Russian list