split is rendered moot by the plugin system: when enabled, binaries do
not link directly with libX11 or libGL. I hope this is a step towards
more consisteny and clarity.
<cucul.h> will provide the C99 types, even if libcaca has been installed.
* Rename what's left of "common.h" to "stubs.h".
* Remove all references to erroneous <inttypes.h> from source files.