GRIM: Initialize members in Blocky8's constructor
GRIM: Initialize members in Blocky16's constructor.
GRIM: Set _filename by initializer-list in Model.cpp
GRIM: Reduce scope of a few variables in MaterialData::initEMI
GRIM: Initialize more members in Font's constructor
GRIM: Initialize BitmapData's _fname in initializer-list
GRIM: Initialize more members in Costume's constructor, and move _fname initialization to initalizer list.
GRIM: Initialize more members in Layer's default constructor