BUG: error copying edge attributes when using a vertex selection as input to vtkExtractSelectedGraph

     NB: 3 cases may occur: size unused, allowed or mandatory. In the
     latter case, if no size is provided, then a default value (#-defined)
     is assigned.
ENH: added minimal support for table preambles.
ENH: moved the GetColumnType methods to the internals of ExecuteSchema.
     This results in a smaller API, at the expense of a little flexibility.
ENH: refined support for various types at the concrete class level

COMP: Mask out two more frequently occurring Qt warnings. Eliminate unused variables to eliminate warnings.

     1. a relatively generic implementation at the parent-class level
     2. a specialized implementation for vtkMySQLDatabase
ENH: modified ExecuteSchema to make it use GetIndexSpecification() instead
     of a hard-coded index creation syntax.
STYLE: more documentation

       type with MySQL.

     method, whereas this should be MySQL-specific (backquotes around
     column name).
ENH: support the INT AUTO_INCREMENT type -- and in that case, automatically
     append NOT NULL.

STYLE: better documentation of the GetColumnSpecification syntax at the
       parent-class level

ENH: Adding public lock() and unlock() to vtkPanel so the user can explicitly protect code that indirectly causes a Render().

ENH: give targets unique names to fix problems when both ITK and VTK are embedded into a single larger project (as revealed by CMake 2.5)

BUG:   Fixed error where the output FIELD_TYPE was always set to vtkSelection::POINT.  Now graphs are output with vtkSelection::VERTEX.

     use the same syntax for column creation.
    NB: the implementation that is provided at the parent-class level
    should work for at least two backends (SQLite and MySQL), but it is
    also known that it won't for PostgreSQL -- for which a specific
    implementation will be provided later.

ENH: Add SetOutputSpacing/SetOutputOrigin methods to vtkImplicitFunctionToImageStencil and vtkPolyDataToImageStencil.  In VTK 4, the Spacing and Origin used to be taken from the consumer of the vtkImageStencilData via an ugly hack which does not work in VTK 5.  In VTK 5, the Spacing and Origin must be set explicitly.

STYLE: Indent sanely.

     handles