Adding support for the `appPackageName` attribute for over-the-air installs.
Switching to use a mapping of attributes to sigin params.

This supports the generic passing of attributes to the `signIn` function without needing to add additional checks for each attribute.
Fixing a bad operator.
Adding default for `appPackageName` attribute.

Updating the comparison operator for the attribute value.
Merge pull request #36 from Zoramite/appPackageName

App package name support for over-the-air installs
Removing the meta page-level configuration for the signin.
Using the api loading to trigger an immediate auth check.

This allows for checking for previous signin state without using the meta tags.
Fixing the name of the immediate param.