guadec 2015 porting LibreOffice to gtk3 slides

Presented our porting LibreOffice to GTK3 presentation at GUADEC yesterday. Here, as hybrid pdf, are those slides with a rough guide to our architecture there and current wayland progress.

It was pointed out after the presentation (by jrb), that our gtk3-themed spinbuttons had the up and down buttons in +,- order instead of the correct -,+ order. So that's fixed now.

crash testing, 80000 documents, 0 export failures, 0 import failures

The last LibreOffice crashtesting run reports our goal of 0 import/export crash/asserts. This is on a refreshed up to date 80000 docuent corpus from various bugzillas and other sources.

Earlier runs had been over a static collection of 76000 documents, hopefully now we have zeroed the dials we can refresh the corpus far more frequently, perhaps on every run, and actively trawl for crasher documents.