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This extension scales a document to fit different SVG DPI -90/96-

Copyright (C) 2012 Jabiertxo Arraiza, jabier.arraiza@marker.es
Copyright (C) 2016 su_v, <suv-sf@users.sf.net>

Version 0.6 - DPI Switcher

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA


Changes since v0.5:
    - transform all top-level containers and graphics elements
    - support scientific notation in SVG lengths
    - fix scaling with existing matrix() (use functions from simpletransform.py)
    - support different units for document width, height attributes
    - improve viewBox support (syntax, offset)
    - support common cases of text-put-on-path in SVG root
    - support common cases of <use> references in SVG root
    - examples from http://tavmjong.free.fr/INKSCAPE/UNITS/ tested

TODO:
    - check grids/guides created with 0.91:
      http://tavmjong.free.fr/INKSCAPE/UNITS/units_mm_nv_90dpi.svg
    - check <symbol> instances
    - check more <use> and text-on-path cases (reverse scaling needed?)
    - scale perspective of 3dboxes

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