Version 1.0.35 - 2016-08-12  "List Failed Adds" fixed.
Version 1.0.34 - 2016-08-12  Implemented the new features of Calibre 2.64 Custom Columns datatype of 'comments'.  Zotero Custom Columns have been changed to always be 'long-text' with the heading on the 'side' of the book detail pane.
Version 1.0.33 - 2016-07-20 Changed temporary file creation for "empty books" to avoid failures.
Version 1.0.32 - 2016-07-20 Enhancement to the handling of complex html files having many associated images and javascript files that need to be zipped together prior to adding to Calibre.
Version 1.0.31 - 2016-07-19 Repair any invalid or corrupt file attachment path values during the import process.
Version 1.0.30 - 2016-07-19 New: User options to copy Zotero automatic and/or manual tags to Calibre Tags.
Version 1.0.29 - 2016-07-18 Changes to 'Compare Zotero Database to Calibre Database' to take advantage of the new Identifier 'zkey_file'.
Version 1.0.28 - 2016-07-18 Major enhancements.  New Identifier:  zkey_file.  New user option to import .html file attachments as Calibre "books", although Calibre will automatically convert them into .zip formatted books.
Those must then be manually converted from .zip to .epub to be readable. New user option to import "empty books" for Zotero items that have no file attachments.
Version 1.0.27 - 2016-07-15 Miscellaneous enhancements; New Calibre Identifier of 'zcollection' is updated for books with their matching Zotero collection name automatically whenever the Compare function is executed for their Zotero collection.
Version 1.0.26 - 2016-07-15 New: Compare Zotero Database to Calibre Database to find Zotero books missing from Calibre.
Version 1.0.25 - 2016-07-13 Miscellaneous enhancements.
Version 1.0.24 - 2016-07-12 Miscellaneous enhancements.
Version 1.0.23 - 2016-07-07 New: 'Auto-Select Multiple CSV Files' then Auto-Process all of them simultaneously.  Afterwards, archive or delete the original CSV files.
Version 1.0.22 - 2016-07-06 Miscellaneous enhancements.
Version 1.0.21 - 2016-07-05 Technical enhancements.
Version 1.0.20 - 2016-07-04 Technical enhancements.
Version 1.0.19 - 2016-07-03 Enhancements to increase the efficiency of the ZMI 'process'.
Version 1.0.18 - 2016-07-02 Miscellany.
Version 1.0.17 - 2016-07-01 Many small enhancements to increase the efficiency of the ZMI 'process'.
Version 1.0.16 - 2016-06-30 New options to enhance the efficiency of the ZMI 'process'.
Version 1.0.15 - 2016-06-30 New: Progress Dialog with ability to cancel; miscellaneous tweaks; ToolTip enhancements.
Version 1.0.14 - 2016-06-30 Major Enhancements.
Version 1.0.13 - 2016-06-28 Changes.
Version 1.0.12 - 2016-06-28 Major Enhancements.
Version 1.0.11 - 2016-06-28 Enhancements.
Version 1.0.10 - 2016-06-27 Major enhancements.
Version 1.0.9 -  2016-06-27 New CSV-related error messages to assist in correcting CSV data issues.
Version 1.0.8 -  2016-06-27 Enhancements.
Version 1.0.7 -  2016-06-26 Enhancements.
Version 1.0.6 -  2016-06-26 Major enhancements.
Version 1.0.5 -  2016-06-25 Major enhancements.
Version 1.0.4 -  2016-06-24 New Identifier: DOI (Document Object ID) added from ZDoi.  New messages while calibredb is adding missing books.
Version 1.0.3 -  2016-06-23 New:  Detects Keys for Zotero books that do not exist anywhere in Calibre in the ZKey (#zotero_key) Custom Column, and offers to run calibredb to add them.
Version 1.0.2 -  2016-06-22 Changes for Linux & OSX; New auto-run Validation of Custom Columns after ZMI starts.
Version 1.0.1 -  2016-06-22 Initial release.