RapaGUI's default build is for GTK2. For some platforms, an additional build for
GTK3 is also available.

Furthermore, RapaGUI for GTK2/3 comes in two different flavours: With and without
support for the HTMLview view class. The reason for this choice is that on many
Linux distributions WebKitGTK+, which is required for RapaGUI's HTMLview class,
is not installed by default. Thus, the HTMLview version of RapaGUI will not work
on these systems at all unless the user manually installs WebKitGTK+ which can
be an annoyance.

Therefore, it's recommended that you use the "webview" build of RapaGUI only if
your project absolutely needs to use RapaGUI's HTMLview class. Otherwise, just
use the normal build without support for the HTMLview class for the best
compatibility.
