Excessive use of nan/infinity/max

[mglisse]

(generalization of #413)
There are a lot of places where we rely on the type (filtration value, coordinate, etc) supporting NaN, infinity and/or max. However, there are perfectly sensible types that do not support any of those (think BigInteger). Using the special values is convenient, but we should see if there are places where we could avoid using them without penalizing double too much (speed + code readability).