v0.3.0

• We no longer create a .zigversion pinning to nightly when none is otherwise present. We still default to nightly though when resolving the toolchain path though
• Toolchain version can be set using an environment variable ZIG_VERSION
• Several new ziege commands: home, path|zig-path
• When setting the version, you can now use nightly or master and ziege will resolve to the latest nightly and update .zigversion accordingly
• After noticing that zig build dependencies specified as paths ended up getting their own .zigversion files created with the default nightly version, it was clear that ziege was getting called by zig build. To be sure the versions are the same, ziege now sets the ZIG_VERSION env var when proxying zig and zls.

Full Changelog: v0.2.0...v0.3.0