Moved SSH key generation to shell section, and added some more brief notes on SSH

[wtk]:
I resolved some conflicts in version-control/git/remote/Readme.md,
mostly due to workshop-specific changes in workshop names diverging
between my master and Erik's 2012-10-gmu work (which is based off
f26ec654, the current 2012-10-caltech content minus a few
workshop-specific commits.
git/remote/Readme.md: Fix 'pasword' -> 'password' typo
Merge remote-tracking branch 'wking/embray-ssh' into ssh

Conflicts:
	version-control/git/remote/Readme.md