Travis working with numpy and biopython dependencies
Removed fit_parameters, since nonzero parameters should be the default
k-means with k-means++ initialization, some problems but maybe in multinomial or lack of data
added representation of DNA class
Started with split_seq function in dna
Started profiling dna.py
Optimized calculate_signature, since it was very time consuming for corrbin
Faster log_fac calculation
Tests for log_probability in multinomial
Merge branch 'development' into dirichlet
Contigs test data should not be a link
Tests for dirichlet
Test for split_seq_to_signatures
Split seq to signatures