Add support for list of worstcase stacks

[jerome-pouiller]

This patch should fix #87. It provides a list of all the possible largest stacks.

Notes:

• It is not possible to sort the list. I would be glad to have some help on this topic
• The indirect calls (call to pointer to functions) are not supported (see Chasing callbacks/function pointers? #105). Fully automated support for this case is very difficult. However, we could annotate the paths with indirect calls (Detect functions with indirect calls #113).
• An extension of the previous bullet would be list all the places where indirect calls happen. For that, we need a list of all the recursive callees.