Added X-SAMPA support, a while ago.
Added X-SAMPA table.

Also:
1. Cleaned up text handling by storing them in resource.
2. Added useful methods to make code look better.
3. Allowed PreviewWindow to be used for general text displaying.

Signed-off-by: Xiaomao Chen <xiaomao5@live.com>
Added loading/saving abilities.

Signed-off-by: Xiaomao Chen <xiaomao5@live.com>