Wrapper for MUI and traditional BOOPSI in E

GUI Wrapper

As part of my object oriented framework in E, I plan on making a wrapper class for GUI widgets. Any comments and concerns about inconsistencies between layout.class in BOOPSI and MUIMaster.library should be noted here. In addition to E-vo and AmigaOS3, this needs to work on EEC for portability to OS4 and MorphOS.

If a C version is developed at a later date, it will need var-args wrappers for the row and col (column) functions. They group for the dynamic layout engines. The original E should just use EList parameters.