Enable suppression of specific settings elements

When parsing the settings for the settings modal, pass through a sanity check to suppress certain values, if required.

For example, do not display passwords in the settings modal, by default.

To extend, add a function in your Store library:
`
  def hidden_keys
    super.concat(["key1","key2"])
    # super.push("key3")
  end
`
Merge pull request #63 from anchor/suppress

Enable suppression of specific settings elements