Added a gutter and currentline highlighting to the SQL editor.

Currently gutter only shows linenumbers. Code is mostly from http://doc.qt.io/qt-5/qtwidgets-widgets-codeeditor-example.html

There is a little bit included in this commit from a first try to make toobars adept to the current tab.

Code #2

pgsql/SqlGenerator.h

@@ -0,0 +1,15 @@
+#ifndef SQLGENERATOR_H
+#define SQLGENERATOR_H
+
+#include "Pgsql_Params.h"
+
+//namespace Pgsql {
+
+//template <typename >
+//class AndCondition {
+//	AndCondition& add(const std::string &expr,)
+//};
+
+} // end of namespace Pgsql
+
+#endif // SQLGENERATOR_H