Styles, scripts and page titles are no longer set from controllers level.
Changed because it was breaking MVC pattern and led to spaghetti code.
Also, optimized JS/CSS inclusions a bit.
- No random chdir() calls
- No more exceptions when executing scripts from dirs other than root
- find-posts.php prints absolute paths making piping more useful
- Centralized use of TextHelper::repr..() instead of hardcoded markdown
- Centralized processing of highlighting instead of hardcoded markdown
- Highlighted items are marked with color, not just bold
