Remove default n values in epi_slide and epix_slide

[kenmawer]

Addresses issue #160.

[brookslogan]

Code changes look good to go. Doc changes look good, but see question below. Interestingly, as far as I can tell, the vignettes are all already compatible with this change!

Question: is it worth clarifying in the @param n docs (for epi_slide, epix_slide, $slide) that n must be passed by name?

[brookslogan]

I don't think GitHub recognizes "addresses", but does recognize "closes" and "resolves". Closes #160.

[kenmawer]

Note that this is for epi_slide only and not epix_slide.

[brookslogan]

In GitHub's diffs, I see changes in epi_slide, epix_slide, and epi_archive's $slide. Are some of them not supposed to be there?

[kenmawer]

These should be here, because we are removing the default n values. Any changes in the documentation, etc. is due to taking out the now outdated info about the default n being 7 where it's specified.

[brookslogan]

Sorry, having trouble loading in context.

Note that this is for epi_slide only and not epix_slide.

Could you please explain this a bit further?

[brookslogan]

Note from call: removing the n default did apply to both epi slide and epix slide. The change that didn't apply to both was in another PR.