added rom scraper and rom caching
self.blank_image to load before other elements
fixed division by zero error
Merge branch 'master' of https://github.com/mholgatem/pimame-menu

Conflicts:
	pmmenu/pmconfig.py
	scraper/scraper_api.py
Merge branch 'master' of https://github.com/mholgatem/pimame-menu
commit
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scraper optimized/boxart polished
updated scraper - fixed bugs

Fixed scraper bugs relating to .dat files
multithreading for romlistscene boxart

-Added multithreading for romlistscene boxart to keep navigation delays
at a minimum.

-Added SCENE_NAME variable to scene objects to help identify which scene
is currently visible (to kill boxart multithreading when not on
romlistscene)
Merge pull request #35 from mholgatem/master

added rom scraper and rom caching