Switched from -Xlinker to -Wl, syntax to get linking working with
clang++'s -O4 LLVM-IR-based lto. Works wonderfully on Linux. Not
cross-platform ready.
Conflicts:
	SConstruct.py
Move theme.[ch]pp to display/
move tooltips.[ch]pp to display/
Updated gitignore, GOALS
Conflicts:
	GOALS.md
moved video.[ch]pp to display/
moved display.[ch]pp and diaglogs.[ch]pp to display/