Add smart banner config
Add smart banner config

Uses smart banner config in config.json to extract info from play store
and show it in a smart banner configured in main project.

Title and author will be exposed in app.common.config.smartBanner object
in main project.

In config.json smartBanner object you can specify other options
like "daysHidden" or "daysReminder" and they will be exposed too.

bquarks/polygulp