Update

[firephreek]

Extension should work on windows and linux now with the latest version of Inkscape.

• Removed os.system calls and replaced with inkex.command calls.
• Resolve deprecation warnings for option parser, unitouu, input_file, and affect vs. run calls.
• use os.path instead of string concatenation.
• handle unsafe file writes
• provide ios/windows resolutions as arrays for easier updating
• new debug and export_image methods for convenience.

Unhandled: Refactor to PEP 8 standards. Seemed like the code was already opinionated so I left that alone for the most part.

[ScreamingTaco]

Howdy! Sorry it's taken me so long to get to this, but I'm trying to be more active in maintaining this tool now. I've guessing a lot of these issues were addressed y #5, but not all of them. If you'd still like to contribute, feel free to rebase with the new changes and update this PR. Sorry again for the delay.