Uses secure RubyGems URL
fix nil hash warning in pg info
Fix inaccurate 'internal server error' message

This happened when all 3 conditions were met:
  1) no app was specified
  2) no app could be inferred
  3) app::db shorthand was not used
use lowercase help strings in pg
Merge remote-tracking branch 'vfrride/patch-1'

* vfrride/patch-1:
  Uses secure RubyGems URL
Merge pull request #979 from will/two-pg-fixes

Two pg fixes
deprecate account:confirm-billing
Make sample command output match command input
Merge pull request #998 from heroku/doc-patch-scaling

Make sample command output match command input