[cxxtags_query] Added function to dump the contents of a table.
[cxxtags_query] Refactored.
[cxxtags] Updated database format. Added information about type to table 'decl'.
[cxxtags] Refactored.
[cxxtags][test] Updated database format. Added type information.
[cxxtags_query] Added feature that print type information.
[cxxtags_query] Refactored.