Added "Pick/Basic: A Programmer's Guide - Jonathan E. Sisk", under Basic.
Fixed "CodeCademy Python" spelling to "CodeAcademy Python", under Python.
Added book to Basic - Pick/Basic: A Programmer's Guide.
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Merge pull request #1211 from eclutsk/free-programming-books.md

Added "Pick/Basic: A Programmer's Guide - Jonathan E. Sisk", under Basic...
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
Added Codility to interactive tutorials