Subversion migration cheat sheet (first-draft)

Cheat sheet for guidance on migrating and interoperation of Git, GitHub, and SVN.

[RENDERED](https://github.com/github/training-kit/blob/cheatsheet-subversion-migration/downloads/subversion-migration.md)
This table is kinda confusing to me. Some "partial" items have an explained behavior, others dont.

Also, is the "Behavior" meant to be explaining the difference between the two? Like `status`, svn has it, but then why explain the behavior? Are we saying "yes svn has this too, but in GIT it does: "State of the working tree". "