Add syntax for specifying titles identifier. Code derived from Renaud Littolff's contribution.
Move syntax highlighting from Google's code prettyfier (JS) to GeSHi library (PHP).
Debug code blocks.
Setting one single static GeSHi object among all Code objects.
Merge branch 'master' of https://github.com/Amaury/SkrivMarkup

Conflicts:
	lib/Skriv/Markup/Html/Config.php
	lib/Skriv/Markup/Html/Title.php