Overview of changes between 1.19.1 and 1.19.2
==============================================
- Render a crossed box for each invalid input byte to pango_layout_set_text().
  Previously we rendered an ASCII question mark instead.  The crossed box has
  a glyph of value of PANGO_GLYPH_INVALID_INPUT.
- Use pkg-config to detect cairo features [Benjamin Otte]
- Improved docs.  Particularly, examples/cairo*.c have inline docs now.
- New public macro:

	PANGO_GLYPH_INVALID_INPUT

- Bugs fixed in this release:
	Bug 502926 – pango-1.16.4 configure bug: can fail to accept cairo
	Bug 399573 – replace strtoul in pango-markup.c with pango_scan_int()
	Bug 478914 – Use something invalid instead of '?' when validating
		input text
	Bug 501938 – Arabic shaping broken with vertical layout with
		vertical-hint=line
	Bug 501575 – Compile errors
		Patch from Jens Granseuer