Add concurrent.futures to replace multiprocessing.Pool. Enables Gotham and Android compat. Refs #36
Android: Fix dumbdbm._chmod on FAT32. Refs #36
Android is also a Linux, so move it before Linux detection. Refs #36
Increase torrent2http poll rate to 1hz, no need for faster.
Switch to concurrent.futures. Enable Gotham and partial Android support.  Refs #36
Enable Android support for torrent2http launcher. Refs #36