Resolves #343 GUI and Frame Refactor

Major rewrite of the GUI into a module and view form, also using a new Feed class. The frame and frameset data structures have also been rewritten to support memory pooling and response frames.

SDK/C/src/streams.cpp

@@ -42,7 +42,7 @@ static void createFileWriteStream(FTLStream *s, const ftl::URI &uri) {
 	if (!root) {
 		int argc = 1;
 		const char *argv[] = {"SDK",0};
-		root = ftl::configure(argc, const_cast<char**>(argv), "sdk_default");
+		root = ftl::configure(argc, const_cast<char**>(argv), "sdk_default", {});
 	}
 
 	auto *fs = ftl::create<ftl::stream::File>(root, "ftlfile");