Add optional OSC support

Add OSC receiver

add BUGS

fix README

OSC: use QVariantList to send messages to the main window

show text under icons in toolbar

remove deprecated class

detect liblo and make it optional

OscReceiver.cpp

@@ -0,0 +1,71 @@
+#include "OscReceiver.h"
+#include <iostream>
+#include <cstdio>
+
+OscReceiver::OscReceiver(const std::string &port) :
+    port_(port), 
+    server_(lo_server_thread_new(port_.c_str(), error))
+{
+// #ifdef CONFIG_DEBUG
+//     /* add method that will match any path and args */
+//     lo_server_thread_add_method(server_, NULL, NULL, genericHandler, this);
+// #endif
+}
+
+OscReceiver::~OscReceiver()
+{
+//    std::cout << "Freeing OSC server thread\n";
+    lo_server_thread_free(server_);
+}
+
+void OscReceiver::addHandler(const char *path, const char *types, lo_method_handler handler, void *userData)
+{
+    lo_server_thread_add_method(server_, path, types, handler, userData);
+}
+
+void OscReceiver::listen()
+{
+    int lo_fd = lo_server_get_socket_fd(server_);
+    if (lo_fd == 0)
+    {
+        std::cout << "OSC port " << port_ << " is already in use." << std::endl;
+    }
+    else
+    {
+        std::cout << "Listening on port " << port_ << std::endl;
+        lo_server_thread_start(server_);
+    }
+}
+
+void OscReceiver::error(int num, const char *msg, const char *path)
+{
+    std::cerr << "liblo server error " << num << " in path " << path 
+        << ": " << msg << std::endl;
+}
+
+// #ifdef CONFIG_DEBUG
+// /* catch any incoming messages and display them. returning 1 means that the 
+//  *  * message has not been fully handled and the server should try other methods */
+// int OscReceiver::genericHandler(const char *path, 
+//         const char *types, lo_arg **argv, 
+//         int argc, void * /*data*/, void * /*user_data*/) 
+// { 
+//     //OscReceiver *context = static_cast<OscReceiver*>(user_data);
+//     printf("path: <%s>\n", path); 
+//     for (int i = 0; i < argc; ++i) 
+//     { 
+//         printf("arg %d '%c' ", i, types[i]); 
+//         lo_arg_pp(static_cast<lo_type>(types[i]), argv[i]); 
+//         printf("\n"); 
+//     } 
+//     printf("\n"); 
+//     fflush(stdout); 
+// 
+//     return 1; 
+// } 
+// #endif // CONFIG_DEBUG
+
+std::string OscReceiver::toString() const
+{
+    return "port:" + port_;
+}