[JOSS] target audience?

[jGaboardi]

Regarding the Statement of Need, the docs and manuscript clearly state what problems are being solved, but there is no mentioned of who the target audience is.

This should be added to:

• the actual manuscript
• README.md
• the docs site

For reference:

• Documentation Do the authors clearly state what problems the software is designed to solve and who the target audience is?
• Software paper Does the paper have a section titled 'Statement of Need' that clearly states what problems the software is designed to solve and who the target audience is?

xref: openjournals/joss-reviews#4021

[ni1o1]

We add the statement of target audience in the state of need part of the manuscript, the README.md and the docs site.

[jGaboardi]

xref: #13