Bump version for sparkle updater. Core is still 2.5

Author: clobber

Info.plist

@@ -19,7 +19,7 @@
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleVersion</key>
-	<string>2.5.4</string>
+	<string>2.5.5</string>
 	<key>NSPrincipalClass</key>
 	<string>OEGameCoreController</string>
 	<key>OEGameCoreClass</key>