Use latest OOBase

Signed-off-by: Rick Taylor <rick@tropicalstormsoftware.com>
Use subdir-objects in configure.ac

Signed-off-by: Rick Taylor <rick@tropicalstormsoftware.com>
No freetype or OOXML anymore

Signed-off-by: Rick Taylor <rick@tropicalstormsoftware.com>
Remove unnecessary non-const frame buffer initialisation

Signed-off-by: Rick Taylor <rick@tropicalstormsoftware.com>
Change the argument types to the Window signals

Signed-off-by: Rick Taylor <rick@tropicalstormsoftware.com>