basic man pages for -view and -input

doc/man/man1/notcurses-input.1

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+.TH notcurses-input. 1 "2019-12-05"
+.SH NAME
+notcurses-input \- Display and decode input
+.SH SYNOPSIS
+.B notcurses-input
+.SH DESCRIPTION
+.B notcurses-input
+reads from stdin and decodes the input to stdout, including synthesized events.
+.SH SEE ALSO
+notcurses(3notcurses), terminfo(5)

doc/man/man1/notcurses-view.1

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+.TH notcurses-view 1 "2019-12-05"
+.SH NAME
+notcurses-view \- Render multimedia to the terminal
+.SH SYNOPSIS
+.B notcurses-view
+.IR files...
+.SH OPTIONS
+.TP
+.IR files
+Files to successively render.
+.SH DESCRIPTION
+.B notcurses-view
+renders multimedia to the terminal using libav.
+.SH NOTES
+Proper display requires a terminal advertising the RGB terminfo(5) capability (necessary for specification of arbitrary 24bpp colors), and a monospaced font with good Unicode support.
+.SH SEE ALSO
+notcurses(3notcurses), ffmpeg(1), terminfo(5)