Summary: Methods for dumping information about a variable

Description:
Displays informations about the values of variables on a graphical
way:
- If given a simple variable (string, integer, double, resource), the
value itself is printed,
- If given an array, it is explored recursively and values are
presented in a format that shows keys and elements,
- If given an object, informations about the object and the class are
printed.

Maintainer: mokraemer