Platform specific code, handles ARM
UA -> USER_AGENT
Support for new torrent2http. refs #4, refs #5, refs #6
EZTV: use session and properly terminate the threadpool
Kickass: session and proper threadpool termination
YIFY: properly terminate threadpool, and properly update the progress dialog
torrent2http: use minimum memory mode on ARM
Nice torrent2http on ARM. Closes #14