Whats New :
New Features
ODT Input: Add backlinks for footnotes/endnotes and improve their formatting.

Closes tickets: 1421056
Windows: When running on windows 8 and newer register with default programs so that users can more easily select calibre or its viewer/editor as the default program to launch ebook files.

Closes tickets: 1422248
Make publishers in the book details panel clickable.

Closes tickets: 1419313
Edit Book spell check: For mis-spelled words of the form one:two offer one: two as a suggested correction.

Bug Fixes
Fix a regression that caused incorrect results when searching on numeric or date fields with relational operators.

Closes tickets: 1423390
DOCX Input: Fix regression in 2.19 that broke handling of text with leading or trailing non-breaking spaces/en-spaces/quad-spaces.

Closes tickets: 1422844
Amazon metadata download: Update plugin for website changes to Amazon Brazil.

Closes tickets: 1420629
E-book viewer: Fix footnote popup window not displaying entire footnote if footnote contains element with page-break-after set
Edit Book: Reports tool: Fix double clicking on an unused image causing an error
Tag Browser: Fix incorrect grouping of words starting with graphemes, such as ash.

Closes tickets: 1422116
Conversion: Ignore incorrectly URL encoded links instead of erroring out on them.

Closes tickets: 1421996
E-book viewer: Remove soft-hyphens when copying text to clipboard
Improved news sources
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