Create an 'integrate' method

[lpatiny]

Please check the documentation of the ms/integrate file. It is not really trivial to implement a FAST algorithm ...

[maasencioh]

the concern it's more if it's fast or if it's accurate? because if we round the value, it's 'easy' to map it to an object and start to add them, but if we like a more accurate version we could consider to use hierarchical clustering