Removed all checkstyle warnings

Added checkAssets method, breaking up checkScreen method
Checkstyle fixes
Merge branch 'master' of https://github.com/9124SAVOIAD/SimSys
Minor checkstyle changes. Rename of SharedInformationBox.java to the shortened SharedInfoBox.java to make imports play nicely with Checkstyle. Some changes of imports throughout as a result of the class name change (mostly in gamegeneratorcollection).