Add automatic image resize.
This will shrink image proportionality to a width of 1000 pixels. This has
major speed improvements.
Changed main() to use argparse.
Added more verbose output in main()
Fixed whitespace and spelling
Moved resize code to it's own function.
Added a command line option to resize to max 800x600.
Added a note about resize changing result
Created test for true positive and false positive rates
Remove unneeded variable setting
Add multiprocessing support

The command line version will now scan with all cpu cores by default.
-t option can be used to set the number of threads.
Merge remote-tracking branch 'hhatto/master'
Disable multiprocessing if user did not ask for it
Remove unneeded print
Style changes to as per @hhatto's request
Add newline at end of file...
Merge branch 'master' of github.com:hhatto/nude.py
Merge pull request #4 from Drewsif/master

Performance and command line update