Fix font size for rare taxa list

[EmbrietteH]

This PR adds the previous code change done by Luke, and in addition, further changes the font size from small to footnotesize to ensure participant pdfs are a single page.

[mortonjt]

This is interesting. Looks like the build took too long :/

[mortonjt]

Looking over this post, I'd try adding travis_wait at the beginning of the last line in the .travis.yml

[EmbrietteH]

The build has completed successfully now (thanks @mortonjt ). @mortonjt @squirrelo @josenavas can I get a review?

[squirrelo]

Code looks fine. Is there a before & after render screenshot?

[EmbrietteH]

Before and after shots (in reverse order). Before: 2 pages due to the rare taxa list being too long and pushing down the PCoA plots onto the second page. After: everything on a single page.

Note that the number of rare taxa is slightly different as the before shot was taken from results produced after rounds1-21 and the after shots was taken from results produced after rounds 1-22.

[squirrelo]

Looks good to me, 👍