ENH: Releasing database resources.

Code/Application/Monteverdi2/main.cxx

Code/Application/Monteverdi2/mvdApplication.cxx

Code/Application/Monteverdi2/mvdApplication.h

Code/Common/Core/mvdDatabaseConnection.cxx

Code/Common/Core/mvdDatabaseConnection.h

Code/Common/Core/mvdDatabaseError.cxx

Code/Common/Core/mvdDatabaseModel.cxx

Code/Common/Core/mvdDatabaseModel.h

Code/Common/Core/mvdI18nCoreApplication.cxx

Code/Common/Core/mvdI18nCoreApplication.h

Code/Common/Core/mvdSql.cxx

Sql/CMakeLists.txt

Sql/sql_insert_items.sql

Sql/sql_sample.sql