Adds a daemon for lbrynet. Currently commands are limited the following:
download_name(name)
resolve_name(name)
get_downloads
stop
This allows other programs to easily interact with lbrynet, such as
LBRYURIHandler. LBRYURIHandler can be built with py2app, the resulting
plist file must be edited in the same way the committed plist file has
been edited. When built and installed to the /Applications folder
lbry:// domain names will download and open the corresponding file so
long as the daemon is running.
Put stream downloader options into its own class, and make stream
downloader options global to the stream type rather than specific
to each factory.
Show downloader options in the lbrynet-downloader-gui.
Make a class for downloader option choices, so that the descriptions
can be displayed.
In the console, if there are multiple choices for the download
option, make it a list selected by its index.
Make sure that the ConnectionManager closes properly when some of
the connections fail to open (e.g. due to a host being down)
