Added "Commentary on the Sixth Edition UNIX Operating System"
Added "Architectural Styles and the Design of Network-based Software Architectures"
Alphabetized OCaml section
Added "Using, Understanding, and Unraveling The OCaml Language:  From Practice to Theory and vice versa"
Added "Warren's Abstract Machine: A Tutorial Reconstruction"
Added I Love Ruby

Added a free Ruby Ebook
Merge pull request #621 from mindaslab/patch-1

Added I Love Ruby
Merge pull request #620 from alexanderfefelov/master

Added "Effective Scala" (CN, RU)
Merge pull request #618 from edusantana/patch-1

Inclusion of book
Added "DSL Engineering: Designing, Implementing and Using Domain-Specific Languages"
Added "Naked objects"
Added "Methods and Techniques for the Design and Implementation of Domain-Specific Languages"
Added "Prolog Problems"
Added "S-99: Ninety-Nine Scala Problems"
[es] added 3 books of Eugenia Bahit
Add Git Workflows
Merge pull request #625 from Mouseion/patch-gitbook

Add Git Workflows
Merge pull request #623 from alexanderfefelov/master

Added a few books
Merge pull request #624 from esparta/master

[es] added 3 books of Eugenia Bahit
Merge remote-tracking branch 'upstream/master'