optional resources for the mmseqs2 package

 MMseqs2 (Many-against-Many sequence searching) is a software suite to
 search and cluster huge proteins/nucleotide sequence sets. MMseqs2 is
 open source GPL-licensed software implemented in C++ for Linux, MacOS,
 and (as beta version, via cygwim) Windows. The software is designed to
 run on multiple cores and servers and exhibits very good scalability.
 MMseqs2 can run 10000 times faster than BLAST. At 100 times its speed it
 achieves almost the same sensitivity. It can perform profile searches
 with the same sensitivity as PSI-BLAST at over 400 times its speed.