Add clarification to qiime feature-table filter-features that you can filter with a sequence artifact

[danpal96]

This started as a thread in the forum: https://forum.qiime2.org/t/add-clarification-to-qiime-feature-table-filter-features-that-you-can-filter-with-a-sequence-artifact/32671

I was trying to find a way to filter a feature table artifact so it only has the features from a sequence artifact. I couldn't find it by reading the plugin docs. However, reading the chimera tutorial I found that you can use a sequence artifact in the --m-metadata-file option of the qiime feature-table filter-features plugin to do it. The filter-features docs does not clearly say that this is possible and I think that it needs a clarification.

[gregcaporaso]

This would make a great usage example on filter-features. We'll put this on our list. Thanks @danpal96!