Installation from Source Docs are Misleading

[ryneeverett]

• They currently suggest installing from master which is a couple releases behind.
  • I should either push the latest release to master if I can or update the docs to suggest pulling the latest tag. This would be a good time to document the release process (including the CHANGELOG and version string).
  • We should probably document installing from develop, which is the most common reason to install from source.
• Is this still a reasonable way to install from source with pip? I would think there would be a simpler way by now.