Log Message:
Update to 1.2.2:

- Fixed typo in GdaXqlUpdate object declaration (Murray)
- GCC 4 compilation fixes (Murray, Magnus)
- Made Oracle provider work with Oracle 10 headers (Magnus)
- Fixed MySQL header/libs detection (Jean)
- Fixed typo in GdaExport class signal creation (Mike Kestner)
- Set correctly unsigned values in MySQL provider (Mike Fish)
- Fixed leak in PostgreSQL provider (Alex)

While here, move documentation out of share/doc/html.