Added czech book about webdesign
Added brazillian book about RegEx
Added C language book
Merge pull request #1217 from drgarcia1986/master

Added brazillian book about RegEx
Merge pull request #1218 from WizuO/master

Added C language book in Swedish
Merge pull request #1216 from grogy/cs-books

Added czech book about webdesign
Added PHP book, fixed formatting
Merge pull request #1220 from WizuO/master

Added PHP book in Swedish, fixed some formatting
add mooc classes for android
Added Codility to interactive tutorials
Merge pull request #1214 from grogy/codility

Added Codility to problem sets
fix style nit
Merge pull request #1221 from ekeitho/master

add mooc classes for android