add diseaseEvent class
Change diseaseEvent class
Attach diseaseEvent to simulation
Add sickBeingNumber getter
update main
Merge pull request #41 from aMarcireau/disease

Disease
Normalized
Refactoring Proba system

Current parameter :
wide (for instance max age)
cursor (for instance age of the guy)

if you want to create a probe you create a normal_law object or any
other law available (for the moment only normal law and linear law
exists.

These object create an array of values according to the law they
feature. Then they « roll the dices » and return a boolean
chi 2 law
Merge pull request #42 from aMarcireau/Proba

Proba
Add sgml graphics import