[poppler] Poppler 0.88.0 released

[Albert Astals Cid]

Available from
http://poppler.freedesktop.org/poppler-0.88.0.tar.xz

The tarball is signed at http://poppler.freedesktop.org/poppler-0.88.0.tar.xz.sig with my key
http://hkps.pool.sks-keyservers.net/pks/lookup?op=get&search=0xCA262C6C83DE4D2FB28A332A3A6A4DB839EAA6D7

Release 0.88.0:
core:
 * Support Widget Annotation Buttons not linked to any Form
 * SplashOuputDev: Use stroking opacity when clipping to a stroke path
 * Handle 1 bit RGB images in ICC colorspace
 * Internal code improvements

qt5:
 * Add Document::signatures. Returns signatures not attached to any page
 * ArthurOutputDev: Fix font hinting
 * ArthurOutputDev: Set the opacity when filling with axial gradients
 * ArthurOutputDev: Implement the clipToStrokePath method
 * ArthurOutputDev: Use stroking opacity when clipping to a stroke path

glib:
 * Add poppler_page_get_bounding_box
 * Add poppler_form_field_get_alternate_ui_name
 * Implement rotation for 'flagNoRotate' annots. Issue #767

cpp:
 * Add non_raw_non_physical layout for page::text()

utils:
 * pdftohtml: Fix noRoundedCoordinates->noroundcoord in man page
 * pdfsig: Show also signatures that aren't attached to any page

This release was brought to you by Albert Astals Cid, Aleix Pol, Jiri Jakes, Nelson Benítez León, Oliver Sander, Thomas Freitag, sgerwk and everyone else that filed bugs or helped with code reviews :)

Testing, patches and bug reports welcome.

Cheers,
  Albert