fix broken logo
Removed an unused constant (#347).
Merge pull request #635 from jubatus/bugfix/broken-logo

Jubatus logo is broken
Merge branch 'master' into develop
Made compressor class' derived class' members to have appropriate accessibility (#347).
Made class bit_vector_nearest_neighbor_base and its derived classes to have appropriate accessibility (#347).
Made class local_storage's members to have appropriate accessibility (#347).