Fixing bugs introduced with v1.16.14

Fixes #477 and #476.
Also fixes an error which prevented an empty interior for 'Polyline' and 'Polygon' annotations, when the stroke color was set.
In addition, the interior of line end symbols (where applicable) is now either white, or the interior of the annotation, or an independent fill color set by Annot.update parameter fill_color. Line ends without an interior area remain unchanged (e.g. open arrows, butt, etc.).

New features for annotations

Fixes for issues:
#474 (endcoding errors)
#473 clarify documentation of name changes
#467 introduce manipulation of anti-aliasing levels
#466 ensure correct of use of unicode type
#453 introduce new Document method for PDF scrubbing (sensitive information removal)
#416 allow text line highlighting between two given points and introduce PDF 'blend mode' for annotations

Minor bugfixes

Fixes #465 and implements #464.

Extended Redaction Annotation support

A number of issues are also being fixed with this release:
#447, #461, #397, #463, #454, #434

Support for PDF Redaction Annotations

This release fixes issues #344, #426, #434, #443, #444.

Fixing issues with annotations

Fixing issues #415, #417 and #421.

Fixing several minor issues

This fixes #412, #411 and #407 and also inroduces some minor usability enhancements.

Introducing "fitz as a module"

Various fixes

Fixing #394

fixes #394

Fix #390

1.16.6

upload v1.16.6