Sorted Xcode config
Updated sample appcast to be appropriate for DSA signatures being req…
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.
Bumped version number to 1.5b4. Siiigh...
Bumped Sparkle version number in user agent string.
Merged in fixes to some Tiger warnings.