* Font -> NativeFont. Font is now a wrapper class for the NativeFont
struct.
* FontAtlasWrapped -> FontAtlas, and FontAtlas -> NativeFontAtlas, in line
with other native struct wrappers.
* [BREAKING CHANGE] Removed ImGui.LoadDefaultFont(). It is now available on FontAtlas along
with other Font loading methods. This makes more sense w.r.t. the actual
native interface.
* Modified the SampleProgram to account for the above.
* New wrapper: ImGui.SetKeyboardFocusHere([int offset])
David Pethes
Eric Mellino