...in place of math.h, as we are using round(), which is possibly not provided by the compiler since we don't require a C99 compiler in GTK+-3.x and gtk/fallback-c89.c does include math.h anyways.
This version also merges widgetbowl into fishbowl.
Include gtk/fallback-c89.c so that we can ensure that we have round(), and that file already includes math.h
Avoids usage of GtkFixed where child properties eat up all the CPU time. And that's kinda not what I want to benchmark.
