New module: DIAMOND

[mjamy]

Adds module for DIAMOND.

• This comment contains a description of changes (with reason)
• CHANGELOG.md has been updated
• There is example tool output for tools in the https://github.com/ewels/MultiQC_TestData repository or attached to this PR: Add test data for diamond module test-data#237
• Code is tested and works locally (including with --lint flag)
• docs/README.md is updated with link to below
• docs/modulename.md is created
• Everything that can be represented with a plot instead of a table is a plot
• Report sections have a description and help text (with self.add_section)
• There aren't any huge tables with > 6 columns (explain reasoning if so)
• Each table column has a different colour scale to its neighbour, which relates to the data (eg. if high numbers are bad, they're red)
• Module does not do any significant computational work

Example output:
multiqc_report.zip

[ewels]

As with #1732 - I'm not sure that the bar plot adds anything, so I've removed it. Hope that's ok.

[ewels]

Does this module parse only the output from the --log flag? https://github.com/bbuchfink/diamond/wiki/3.-Command-line-options#general-options

In which case, is the filename always diamond.log? That's much easier (and faster) to search for..

[ewels]

Talked to @jfy133 and it looks like this is the case. I updated the module accordingly in a489954:

• Update search pattern
• Parse sample name from logged command instead of filename
• Fall back to log directory name

Note that if you're manually renaming these log files in the taxprofiler pipeline, you'll need to tweak the search pattern in the pipeline MultiQC config file for it to still find the files. See docs.