Fix debian ruby module dependency

Remove libopenssl and libreadline dependency for ruby>1.9
switch to multi_json
removed unused rake command
Remove legacy SSL
Add a hook for the pg-extras set commands

this way the entire method doesn't have to be overwritten
Merge pull request #1237 from will/wl-pgpsql-hook

Add a hook for the pg-extras set commands
block all commands while updating
Merge pull request #1236 from heroku/block-during-update

block all commands while updating
Merge pull request #1233 from heroku/multi_json

multi json
v3.13.0.pre
v3.13.0
clear out 2fa creds after preauth
better error message when auth failure with HEROKU_API_KEY
only perform 2fa preauth if not in login flow
Merge pull request #1238 from heroku/preauth-fix

preauth fix
v3.14.0
only show old version number after update is complete. It read confusing before
don't rescue Exception class...too broad
Merge pull request #1241 from stensonb/master

don't rescue Exception class...too broad
Merge pull request #1239 from heroku/update-tweak

only show old version number after update is complete