Online installer: MetaPhlAn2 component and license, mpa_v20_m200 database

Online installers on macOS and Linux 64-bit should be modified:

1. On the "Select Components" page of the installers add the following components (between "DIAMOND" and "WEVOTE"):
   • Parent component "Classification with MetaPhlAn2" with description:

     MetaPhlAn2 (METAgenomic PHyLogenetic ANalysis) is a tool for taxonomy classification of metagenomic NGS data. It relies on ~1M unique clade-specific marker genes.
     

   • Child component "MetaPhlAn2 external tools" installs executable from UGENE-6252: "metaphlan2.py" and "utils/read_fastx.py". They should be put to ".../tools/metaphlan2-2.7.7" subfolder of the UGENE package. The description of the component should be:

     Check this item to install MetaPhlAn2 executables.
     

   • Child component "Marker database (mpa_v20_m200)" provides the database files. See UGENE-6254 ("database can be found on the file server in folder "/data/test_data/UGENE-6254/mpa_v20_m200"). The database files should be put to ".../data/ngs_classification/metaphlan2/mpa_v20_m200" subfolder of the UGENE package. The description of the component should be:

     A database with ~1M unique clade-specific marker genes identified from ~17,000 reference genomes (~13,500 bacterial and archaeal, ~3,500 viral, and ~110 eukaryotic).
     

2. On the "License Agreement" page of the installer add "MetaPhlAn2" license. Use the "license.txt" file from UGENE-6252.