Recode PDF delete page

Deleting pages in PDF documents (methods Document.deletePage() and Document.deletePageRange()) is now based on new code: the code of method Document.select() is no longer used for this.

Starting with release, to reduce network traffic we store wheel files exclusively on PyPI.

Fixes several issues: #301, #300, #298

Merge pull request #305 from JorjMcKie/master

upgrade to v1.14.15

Fix bug in Link target point calculation

Merge pull request #282 from JorjMcKie/master

upgrade to v1.14.14

Introduce io.BytesIO as an input option

• For binary, memory-based input to most methods, now alsoio.BytesIO objects are accepted.
• Fixed a bug not correctly showing inserted images with maintained aspect ratio.

Fixes #269, #270

Merge pull request #271 from JorjMcKie/master

upload v1.14.12

Fixes #265

• Page method showPDFpage() now supports rotation by arbitrary angles and automatically handles prevention of duplicates (deprecation of reuse_xref parameter).
• Page method insertImage() now supports rotation of inserted image (by multiples of 90 degrees), and maintains the aspect ratio.

Fix #261

• Support rotation of rectangles displayed via Page.showPDFpage
• Fix a bug which occurred when multiple images were inserted as streams via Page.insertImage.

Fixes #258, #259

• Added support for PDF text rendering mode (the Tr operator). This makes it possible to insert invisible text or glyphs with bordered and filled lines.
• Optimize support for JPX image extraction from PDFs. For these images, we now directly read the binary data.

Fixes JBIG2 decode error

• JBIG2 decode error impacted Document.extractImage and Page.getText method in rare scenarios
• new Pixmap.setRect method
• extend several Pixmap methods to also support non-alpha images

Minor feature improvements and bug fixes

• new Pixmap.setPixel() method
• documentation: new How-To on image conversion
• new text length calculation for Base-14 fonts
• new Postscript output for pixmaps
• Pixmap.writeImage() by default determines image type from filename extension