* Use native-windows-gui crate to manage tray icon
Adds log file support on Windows
* Log file location now works like other paths
* Removed context builder
* Context --> App
* Removed mount URLs from App
* Switch to a nicer crate for forking daemon
* Handle errors from notify_ready
* Add application icon to all Windows Polaris executables, not just those created by the release script
* Add build.rs to release tarball
* Create PID file parent directory if necessary
