Merge pull request #1 from mr-const/master

minor fix for run with default parameters
Format imports according to pep-8. Fix parsing arguments by using argparse.
Add few more comments to the code.
Merge pull request #3 from xa4a/master

Format imports according to pep-8. Fix parsing arguments by using argparse. Add couple comments to the code.
Extracted Sheet and Shred classes away from their IO operations.
Bump __version__. Address review comments: typo, Shred() init args style, storing dpi and handling parse_resolution’s ValueError.
Merge pull request #6 from xa4a/master

Extract Sheet and Shred classes away from their IO operations.
Links to project plan
New backgrounds added, shreds filtering improved, px_to_mm helper added, few bugs in CLI and html generation fixed
Merging conflict resolved, pep0008 issues for sheet.pl/split.py fixed
Merge branch 'master' of https://github.com/dchaplinsky/unshred

Conflicts:
	unshred/split.py