2017/02/09 - 1.1.2:
- PDF: When PdfDoc.drop_cache() is called, make sure *all* the references to
  the Poppler objects are dropped, including those to the pages of the document

2017/02/05 - 1.1.1:
- No change. Version created only to match Paperwork-gui version.

2017/01/30 - 1.1.0:
- Add methods doc.has_ocr() and page.has_ocr() indicating if OCR has already
  been run on a given doc/page or not yet.
  Used in GUI for the option "Redo OCR on all documents" as it must act only
  on documents where OCR has already been done in the past (ie not PDF with
  text included)
- Optim: Provides a method page.get_image() returning an already resized
  Pillow image (PDF rendering optimisation)
- Export: Report progression
- Optim: PDF thumbnail rendering: Keep a cached version of the first page only.
  The other pages can be rendered on the fly
- Fix: Label directory name use base64 encoding, and this encoding can result
  in strings containing '/'. Those characters must be replaced (by '_')
- Fix: util/find_language(): If the system locale is not set properly, pycountry
  may raise UnicodeDecodeError.
- paperwork-shell: Add commands 'search', 'dump', 'switch_workdir', 'rescan',
  'show', 'import', 'delete_doc', 'guess_labels', 'add_label', 'remove_label',
  'rename'
- Import: When importing a single PDF, don't import it if it was already
  previously imported
- Import: Provides detailed information and statistics regarding what has been
  imported (return value of Importer.import_doc() has changed)

1.0.6:
- No change. Version created only to match Paperwork-gui version.

1.0.5:
- Doc deletion: Drop cache and file descripts *before* deleting document
(optional on GNU/Linux, but required on Windows)

1.0.4:
- Windows: Fix image import

1.0.3:
- Windows: Fix import/export

1.0.2:
- No change. Version created only to match Paperwork-gui version.

1.0.1:
- util/find_language(): fix pycountry db lookup
- Windows: hide ~/.config instead of ~/.config/paperwork.conf
