Fix link to terminal-cast page
Fix typos and add shortcut to contribution workflow for experienced developers
Explicitly mention direct email for providing astropy feedback
Another typo fix
Add another reference to virtual environment documentation
Change names used for the remotes origin and upstream
Add version of worked example commands with summary
Change terminal cast link to version with new names for origin/upstream
Add installation instructions for python 3 to code contribution workflow
Fix typos and broken links
Add concise description of rebasing to contributor workflow

Closes #333
Add creation of temporary branch to rebasing instructions
Add link to useful resource for recovering from git mistakes
Include comment about variants on the name python3
Move link to maintainer workflow closer to the bottom of the toctree as suggested by @mkhv
Made CDS reader allow for multiple lines of file descriptions
Tested multi-line file descriptions by altering test README file
Added note in CHANGES.rst
Added another CDS test
minor typo