romlist box art optimization

-rewrote box art function to include less calculations per iteration.
-rom scraper can now be called with --local_images argument, which will
cause the scraper to compare both local images and gamesdb
Merge pull request #49 from ssilverm/mholgatem-master

Mholgatem master
Merge pull request #48 from mholgatem/master

Optimization / Bug Fixes
config raspiconfig
return and update screen after running
Merge pull request #50 from mholgatem/master

return and update screen after running
Update pmcontrollerconfig.py
Merge pull request #51 from mholgatem/master

Update pmcontrollerconfig.py
Update pmcontrollerconfig.py
Merge pull request #52 from mholgatem/master

Update pmcontrollerconfig.py
config
sync
added exit button
Update config.yaml
Update config.yaml
optimization/visual fixes

Condensed code + fixed small visual bugs
tron theme update

style changes
fix GBA call
fixed error with pageup/pagedown (left,right)
Romlist optimization

Romlist scroll optimization
added new section for game description (will be pulled with scraper)