A major update!

- added in 80% Credible interval of pairwise antigenic distance
- added procrustes,
- added support for BMDS antigenic cartography files (in the earlier
version can only read in file with the first 2 lines and the last
trailing newline removed), support for color annotation of viruses
- had bug fixes.
- improved user interface
- uncommented some experimental features
- etc.
Merge branch 'master' into gh-pages