Add support for the Logos language.

samples/Logos/example.xm

@@ -0,0 +1,28 @@
+%hook ABC
+- (id)a:(B)b {
+	%log;
+	return %orig(nil);
+}
+%end
+
+%subclass DEF: NSObject
+- (id)init {
+	[%c(RuntimeAccessibleClass) alloc];
+	return nil;
+}
+%end
+
+%group OptionalHooks
+%hook ABC
+- (void)release {
+	[self retain];
+	%orig;
+}
+%end
+%end
+
+%ctor {
+	%init;
+	if(OptionalCondition)
+		%init(OptionalHooks);
+}