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
