internal/Graphics: Getter for rec. max vertices/indices
Utility: Init calls GraphicsInit
internal/Graphics: Commentation add
Viewport: Update class description
Viewport: Add GetSpan/Origin methods
Viewport: Add SetOrigin/Span methods
Geometry: Format fix
Stamp: Add EndLine method (incomplete)

Need to cache line ascent/descent/gap into GlyphMap and extract it into
Stamp so that Y offset can be calculated in EndLine
gdk/engine/Application: Implement draw/initialization
Add pugixml to extern libraries.

Not included in Bakge.h header; will be used mostly internally for the GDK
engine and tools
gdk/engine/Application: Add config file checking

Will be opened and parsed for window dimensions & properties, etc.
gdk/engine/Application: Updating initialization logging/implementation