Added book «Large-Scale JavaScript» for RU
Added book «Large-Scale JavaScript» for EN
Alphabetized several books

Stopped at Hadoop
Small fixes and additions for RU
Alphabetized Linux books
Alphabetized Perl books
Merge pull request #640 from gabriellim/patch-3

Alphabetized Linux books
Merge pull request #641 from gabriellim/patch-4

Alphabetized and removed duplicate Perl books
Merge pull request #638 from gabriellim/patch-1

Alphabetized several books
Added a few books (RU)
Merge pull request #642 from merkuriy/master

Added a few books (RU) and small fixes
Add book on xv6 operating system
Merge pull request #644 from JIghtuse/master

Add book on xv6 operating system