LOK: kill saveAsWithOptions.

The saveAsWithOptions/saveAs split existed for reasons of historical
API compatibility. Since we're breaking the API currently we can
now get a clean start, and get rid of the redundant saveAs, and
make saveAsWithOptions the standard saveAs function.

Change-Id: Ia3e2294a8604cab08e95b07544c9d10d42dd1152
Signed-off-by: Michael Meeks <michael.meeks@collabora.com>