Frontend developers shouldn't even have to open Eclipse in order to
get started developing PolyGerrit: Eclipse is far from the most
popular frontend development environment, and setting it up for the
first time is an unnecessary barrier.
Add a flag --polygerrit-dev to the daemon command that does two
things:
1. Act as if gerrit.enablePolyGerrit is set to true, enabling the
PolyGerrit UI.
2. Serve PolyGerrit from the local buck-out directory, as if it were
launched from Eclipse, ignoring the version compiled into the war.
Change-Id: Ibfe92d3d53637c5c8424e3200791f28260c0c9fa
f7c2cfa29b