RBTools 0.7.3 added a number of new options, both on the command line

and in RBClient, for controlling cache and SSL verification behavior.

This change standardizes the names a bit to keep them consistent, and

reorders them in the help output to be closer together.
The --in-memory-cache option is now --disable-cache-storage.

--dont-save-credentials is now -disable-cookie-storage, to

match. All the various "disable" options are now grouped together after

the authentication settings.
RBClient was updated to take verify_ssl= instead of

disable_ssl_verification=, to help keep most options positive

instead of negative.

Saw the new output. Posted changes without any errors.
Ran unit tests. They passed, except for one that was already broken.