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.

components/streams/src/filestream.cpp

@@ -399,6 +399,10 @@ bool File::end() {
 
 	UNIQUE_LOCK(mutex_, lk);
 
+	while (jobs_ > 0) {
+		std::this_thread::sleep_for(std::chrono::milliseconds(1));
+	}
+
 	if (mode_ == Mode::Read) {
 		if (istream_) {
 			istream_->close();