Bug with the Matlab version

[cviel]

I have tested the package with Matlab and there are several problems that prevent it from being used :

• It is impossible to have access to the variable in the interval (ex: for x = Interval(1,2), I have tried to use x[1], x(1) or x{1} but I cannot obtain a value)
• The function "IntervalVector" return a wrong interval : y = IntervalVector([[3,4],[4,6]]) should give me [y]= [3,4]×[4,6] but matlab return (<3, 3.000000000000001> ; <4, 4.000000000000001> ; <4, 4.000000000000001> ; <6, 6.000000000000001>) i.e. [3,3]x[4,4]x[4,4]x[6,6]
• the function Interval.EMPTY_SET doesn't work (but you can create an empty set by writing something like "Interval(2,-1)")
• the function IntervalVector([a,a]) with a = Interval(1,2) doesn't work (with the python module it returns [a,a]x[a,a])
• the function max() and min() don't work

I can't test the validity of the function "Function" since IntervalVector returns a wrong result, so to be tested. Good luck to fix it, and thank you for your work !