Default directories should be consistent between source and build

[berquist]

The default top-level for building is doc, and most documentation refers to doc rather than docs. Switch everything to doc.

[codecov-io]

Codecov Report

Merging #43 into master will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #43   +/-   ##
=======================================
  Coverage   81.88%   81.88%           
=======================================
  Files           5        5           
  Lines         138      138           
=======================================
  Hits          113      113           
  Misses         25       25

Impacted Files	Coverage Δ
travis_sphinx/build.py	83.33% <ø> (ø)	:arrow_up:

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[Syntaf]

Thanks for the PR and sorry for the delay. I'll take a look at this when I'm home from work today

[Syntaf]

Is the actual default sourcedir for sphinx doc? Or is this a change made on personal opinion about the naming of mose sourcedirs?

Regardless, this introduces a breaking change into travis-sphinx, something I'm not willing to do. Existing repositories using the default doc dir would start failing after this. Having packages randomly start breaking on me is aggravating to say the least, and I don't want to be one of those packages.

I appreciate the PR however, thank you for taking the time to look into this!

[berquist]

Is the actual default sourcedir for sphinx doc? Or is this a change made on personal opinion about the naming of mose sourcedirs?

There is no default, since sphinx-quickstart places everything in your current working directory. I proposed the change because I was confused about how the language in the README switches between the two, and why doc and docs were appearing in my source tree, and I needed to read all the source code to understand what the default directories are.