Sparkle now requires custom feed parameters to include a "displayKey" and "displayVersion" key. These will be displayed to the user in the initial permission dialog so that he knows what he's getting.
In an attempt to improve 10.3 support, I've added a new build configu…
…ration: Release (GC-support; 10.5-only). Compile with this if your app uses garbage collection. The normal Release configuration will compile 10.3-compatible-y with no GC support.