Added classes to manage simple tabular data of known structure using a

popup containing a wxGrid object.

BasePicker : Abstract class adding a popup to wxPickerBase  styled with
a wxTextCtrl.
BaseGridPicker : Abstract class adding a wxGrid in the popup.

JsonGridPickerCtrl : UI control storing the tabular data in a JSON
array.
LBoundJsonGridPicker : connect JsonGridPicker to database.
LGridJsonCellEditor : use LBoundJsonGridPicker in other wxGrid objects.
LGridJsonCellRenderer : render cell JSON data.

XmlGridPickerCtrl : UI control storing the tabular data in as XML
document.
LBoundXmlGridPicker : connect XmlGridPicker to database.
LGridXmlCellEditor : grid editor for LBoundXmlGridPicker.
LGridXmlCellRenderer : grid renderer for LBoundXmlGridPicker.

JsonHelper and XmlHelper : for applications to quickly get intent value
from database data..

The structure of managed tabular data :

Column 1 : Intent - this is what we want to store/edit. This can be
telephone numbers, email addresses, instant messaging addresses...
any single line piece of information that can exist many times for one
entity (person, company...).
Column 2 : Type - A short description of the intent : 'Home, Work,
Mobile, Fax, Other...'. It is displayed in a non editable wxComboBox.
Column 3 : Preferred - One line of data can be selected as the preferred
one. It is not mandatory, but it must be a single choice.
Column 4 : Notes - single line notes.

Adjust sql scripts and L7.dox.
Applied ANSI formatting style to all files.

Other changes :

Work around a nasty misbehavior.
Grid columns edited by a translated combobox expect full string
data as cell values. LResultSet::BEData() will report these mapped strings,
instead of database real data. LBoundComboBox::IsDirty() will always be
true even if the editor is unchanged once created.
Simplest workaround : disconnect m_BoundComboBox if unchanged.

LGridTextEditor::ProvideFormEditor() : set the form editor's value
explicitely.; wxTextCtrl does not interpret data it receives

LBoundControl::SetNull must be void.

LBoundGrid : Unbind:: instructions should limit to the widget's id, like Bind::

LConnection::GetReturnedKeys should return NULL.
LConnection::SetData should return void.

Notes : wxJSON must be configured with the same prefix as wxWidgets,
here /usr/local/{wxWidgets,wxWidgets-Release}.

L7/LBoundDatePickerCtrl.h

@@ -8,11 +8,12 @@
  */
 
 #ifndef LBOUNDDATEPICKERCTRL_H
-#define	LBOUNDDATEPICKERCTRL_H
+#define LBOUNDDATEPICKERCTRL_H
 
 #include <wx/datectrl.h>
 #include "LBoundControl.h"
 #include "LResultSet.h"
+
 /**
  * Initialised with wxInvalidDateTime. The underlying toolkit must allow wxDP_ALLOWNONE.
  * 
@@ -32,10 +33,8 @@ public:
     /**
      * 
      * @param newData
-     * @return false if newData is not a valid ISO date string.
-     * True if newData is empty, or literal NULL, or a valid ISO date string.
      */
-    bool SetData(const wxAny& newData);
+    void SetData(const wxAny& newData);
     /**
      * Sets the resultset member and registers the control in the resultset.
      * @param newResultSet
@@ -50,7 +49,7 @@ public:
      * Sets the control to invalid date.
      * @return 
      */
-    bool SetNull();
+    void SetNull();
     bool IsDirty();
     /**
      * If IsNull() is true, returns wxEmptyString.
@@ -68,10 +67,10 @@ public:
      * @return 
      */
     static wxDateTime BuildDate(const wxString& ISODate);
-    
+
 private:
 
 };
 
-#endif	/* LBOUNDDATEPICKERCTRL_H */
+#endif /* LBOUNDDATEPICKERCTRL_H */