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Don't count changes to Info.plist (version bumps)

Fix/test reading configuration content in /usr/local/etc/wireguard

closes 21

Include build versions in dist file.

Automate releasing

Fix travis build

Move WireGuard installed validation to Helper, simplify Helper prefer…

…ences.

Allow overriding brewPrefix and path to wg-quick.

Fix watching tunnel state when /var/run/wireguard does not exists at …

…start of Helper.

Begin adding preferences