Migrate Database from Squidb to Room/Realm/Objectbox

[macgills]

Is your feature request related to a problem? Please describe.
Problem Squidb has not received support for at least a year and it plays very poorly with kotlin.

Describe the solution you'd like
A migration to Room which is a part of Android Architecture components or other solutions that more easily expose reactive data will make future work easier and capable of being fully in kotlin

[mhutti1]

This sounds good.

[kelson42]

Looks good

[soloturn]

wow, there is a lot going on now wonder difficult to see any handle to help out @macgills , @kelson42 , @mhutti1 . all seems to be big chunks now, no small increments any more. you'd have a little outline or plan how the next release should go out which supports people to get an idea how they can help?

[kelson42]

@soloturn This is true, we plan to make a 2.5 release next week. Goal is to fix the bugs around the downloader by using Android downlaodManager as download solution.

[macgills]

Fixed in #1170