Added "Best of Smashing Magazine"
Added "PC Assembly Language" (EN, FR, IT, ES, DE, KO)
Fixed error with "PC Assembly Language" (ES)
Added "Creative Commons: a user guide"
Added "Principles of Programming Languages"
Added "Programming in Standard ML, Draft"
Added "Big Fat Rails"
Added "Working through Screens"
Added "Practical mod_perl"
Merge pull request #521 from alexanderfefelov/master

A few books added (EN, FR, IT, ES, DE, KO)