* The zoo demo made manifest that we had some serious problems handling sequences of longer lines in ncplane_puttext(). This remedies most of the problems, though it's not yet perfect. #871
* Guard notcurses* for NULL in log*() #878#879
* Fix memory leak in ncdirect_dump_plane()
If we're fed a word that in and of itself is wider than
the text layout area, and it is not the first word on the
row on which it starts, go ahead and start it there, as
opposed to breaking the line. #720
Also, remove sgr from test suite, as it's not a notcurses
application.
Very simple take at ncplane_puttext(), a new function for linebroken text. Also some very basic unit tests. I doubt this works very well yet, but it handles the simplest cases #682. Added nclog(), internal function for logging. #520
