Moved PQs from blackcore to blackmisc, added header for namespace, mainpage.dox for Doxygen

src/blackmisc/blackmisc.h

@@ -0,0 +1,14 @@
+#ifndef BLACKMISC_H
+#define BLACKMISC_H
+
+// just a dummy header, namespace documentation will go here
+
+
+/**
+ * @namespace BlackMisc
+ * BlackMisc is the namespace for generic utility classes. As of its nature
+ * (containing central classes such as CLogMessage, or CPhysicalQuantity),
+ * BlackMisc is available in any other compilation unit.
+ */
+
+#endif