2.13.44 regtests - initial look

[Phil Holmes]

Looks good.

Main difference between .43 and .44 is the fitting of systems to the page. 
In particular:

page-breaking-good-estimation.log: "-Fitting music on 1 or 2 pages... 
+Fitting music on 1 page...".  Given that the description is "In particular, 
everything should fit on one page here" this is a step forward - however, in 
practice .44 still outputs 2 pages and so this is still a bug.

paper-twosided.log, paper-twosided-bcorr.log, landscape.log all report that 
they're likely to produce fewer pages.  In practice, the paper-two* tests 
still use the same number of pages, but with less output on the final page. 
Landscape fits all the output on 3 pages rather than 4.

page-breaking-systems-per-page.ly is supposed to use a single page, using 
"systems-per-page = 3".  This did not work in .43 and now works in .44.

Full pixel-by-pixel report once I've left the PC over lunch.

--
Phil Holmes
Bug Squad