[ADD/WIP] Push all the Janet changes

This is still unstable(and I still need to design/document the exposed
API)! Do(n't) go and use it!

src/Extensions/Functions.h

@@ -0,0 +1,34 @@
+#ifdef JANET
+
+#include <janet.h>
+
+#define Bind(name)  Janet Janet##name(int32_t argc, Janet *argv)
+
+
+Bind(Milliseconds);
+Bind(CytoVersion);
+
+Bind(WriteStanza);
+
+Bind(CreateXMLData);
+Bind(CreateXMLTag);
+Bind(SetXMLAttr);
+
+Bind(ParseJSON);
+
+Bind(MatrixInvite);
+Bind(MatrixFind);
+Bind(MatrixSend);
+
+Bind(StanzaInfo);
+Bind(GetKey);
+Bind(SetKey);
+
+Bind(DbLock);
+Bind(DbCreate);
+Bind(DbList);
+Bind(DbExists);
+
+Bind(HttpRequest);
+
+#endif