release 0.9.10: mail and chat release, docs and website update to 31 tests
fix website urls for sourceforge tree and downloads
add mail and chat modules with cli, tests and docs
decentralized web hosting (sites): content-addressed site format, publish/serve via local HTTP server and CLI
local full-text search over the verified domain state (web + CLI)
relay reachability, local browser UI, GUI pickers
gui: persist UI settings (theme, data dir, listen, port, bootstrap) via QSettings