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
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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
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Add empty review for Big Data Now 2012
Update Big Data Now Review
Fix typos and structure in Big Data Now review
Fix date
Merge pull request #48 from smolnar/master

Add review for Big Data Now 2012
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