Move text message handling into the new plugin system

src/mesh/MeshPlugin.cpp

@@ -0,0 +1,22 @@
+#include "MeshPlugin.h"
+#include <assert.h>
+
+std::vector<MeshPlugin *> MeshPlugin::plugins;
+
+MeshPlugin::MeshPlugin(const char *_name) : name(_name) {
+    plugins.push_back(this);
+}
+
+MeshPlugin::~MeshPlugin()
+{
+    assert(0); // FIXME - remove from list of plugins once someone needs this feature
+}
+
+void MeshPlugin::callPlugins(const MeshPacket &mp)
+{
+    for (auto i = plugins.begin(); i != plugins.end(); ++i) {
+        if ((*i)->wantPortnum(mp.decoded.data.portnum))
+            if ((*i)->handleReceived(mp))
+                break;
+    }
+}