Merge pull request #39 from m1k3/master

Add Ember.js in Action review
Adding Doing Data Science review
minor typos corrected in Doing Data Science review
Merge pull request #42 from sevo/master

Doing Data Science review
added definitive guide to mongodb review
par gramatickych uprav.
Merge pull request #44 from 1azyman/master

The Definitive Guide to MongoDB, 2nd edition review
Add translations
Affiliate
Fix link
Add Guide to Better Smalltalk review
Rename
Formatting
Add Rails 4 in Action review
Fix minor typos in Rails 4 in Action review
Merge pull request #47 from smolnar/master

Review for Rails 4 in Action
Affiliate
Add empty review for Big Data Now 2012
Update Big Data Now Review
Fix typos and structure in Big Data Now review