A simple kmeans algorithm with minimal dependency

• only depends on STL
• written in the style of STL algorithms
• works with most STL containers

Requirements

• a C++14 compiler (tested with gcc 8.2) & STL
• containers that provide iterators (ideally, RandomAccess iterators); std::vector and std::array both work
• custom iterators should provide traits (value_type at the very least)
• numeric types that are closed under addition, and multipliable with floating point types
• CMake and GTest for unit test

TODO

• parallelize!
• Travis
• test with SequentialAccess containers for fun