Fixed up ability to send frames while not connected and to show frames

that were sent within the same window as received frames. Added a new
scripting window that can be used to create scripts that send and
receive messages at runtime - not done but sort of working.

canfilter.cpp

@@ -0,0 +1,27 @@
+#include "canfilter.h"
+
+CANFilter::CANFilter()
+{
+    ID = 0;
+    mask = 0;
+    bus = -1;
+}
+
+void CANFilter::setFilter(uint32_t id, uint32_t mask, int bus)
+{
+    this->ID = id;
+    this->mask = mask;
+    this->bus = bus;
+}
+
+bool CANFilter::checkFilter(uint32_t id, int bus)
+{
+    if (bus == -1 || bus == this->bus)
+    {
+        uint32_t result = id & this->mask;
+        if (result == this->ID) return true;
+    }
+    return false;
+
+}
+