wip: codegenerator, basic widget present for showing the generated code and specifying

parameters. Some code is also generated but it is not complete yet.

minimum still required
- field assignments
- properly format and escape the query string

pglab/QueryTab.h

@@ -55,6 +55,7 @@ public:
 
 	void copyQueryAsCString();
     void copyQueryAsRawCppString();
+	void generateCode();
 	void exportData(const QString &filename);
 
 	QString fileName() const { return m_fileName; }