Upgrade setuptools prior to installing dependencies

[jaraco]

Avoids issues where setuptools isn't in a viable state during build of other packages.

[coveralls]

Coverage remained the same at 57.914% when pulling aa14324 on jaraco:patch-1 into 8cd0339 on python-excel:master.

[cjw296]

That's great, but can you go through and do this on all of the affected projects?
This workaround isn't practical when you maintain as many libraries as I do :-(

[jaraco]

@cjw296 I do sympathize. I maintain dozens of projects as well, and it's a real pain when there's a common mode in the methodology. I'm wondering if there's a way to automate the application of the workaround to the projects (and the subsequent removal of the workaround when it's no longer needed).