Computing angle between multiple .cv files.
Changing Metagenome.hpp to make objects compatible with the new format.
Implementation of the modifications to cope with the new format.
It still considers metagenomes as a vector based on the fact that
k value is small enough so the kmer count contains almost all of
kmers. The metagenomes are represented by a centrailzed vector however, for
making them more useable to others, writing them (i.e. operator<<) is
writing the raw uncentrailzed counts.
changes to extraction of kmer count according to the modifications on the Metagenome class.