Using std::array forces the dimension of the points to be defined in compile time

[georgeslabreche]

Description

I'd like to use dkm in a system that can cluster different data sets that have their own dimensions. This cannot be done dynamically because the size of std::array needs to be defined in compile time.

Proposed Solution

Use std::vector instead of std::array to contain point data.

[georgeslabreche]

Looks like this issue has already been raised here.