Add Readest

[shuvashish76]

https://github.com/readest/readest It's from one of the developer who originally started KOReader.
F-Droid: readest/readest#627

[offa]

Sounds good!

There are some Google APIs listed here, but those are used in the dev environment only, but not the actual binary!?

[vdbhb59]

Yes, seems the code calls only for the nightly builds and not the stable one.

[offa]

Thanks for bringing this up. Seams there are efforts upstream already: readest/readest#627