[SUGGESTION] Source list import

[mozbius]

Is your feature request related to a problem? Please describe.
This is not related to a problem. It is just a nice feature.

Describe the solution you'd like
This feature is inspired by Saily where it is possible to enter a list of URLs to added multiple sources in one go. When setting up a new jailbreak that is a feature that would be nice to have in Installer.

Describe alternatives you've considered
Obviously Saily would be the alternative but I rather use Installer5

[vanwijkdave]

We'll add it to our list, for now you can also import sources from Sileo, Cydia and Zebra