Rescue from ServiceUnavailable errors when creating addons. It seems that's what's being returned now when attempting to add the deployhooks:http addon.
Merge pull request #46 from thinkmorebetter/bug/addon_crash_fix

Rescue from ServiceUnavailable errors when creating addons
Refactor according to Rubocop style guide
Cosmetic cleanup.

- Don't exceed line widths, align params, use parens with arguments, etc.
More style fixes: EOF newlines, single quoted strings, etc.
Style fixes and small refactorings
Cleanup related to PR feedback.