8xy4 and 8xy5 pass.

more flag tests passing

removes legacy code
moves 'gemmaemu' into 'gemma' crate
moves 'gemmaimgui' into its own crate

update to gemma

gemma/tests/computer_tests.rs

@@ -1,4 +1,4 @@
-use gemmaemu::chip8::computer::Chip8Computer;
+use gemma::chip8::computer::Chip8Computer;
 
 #[test]
 fn smoke() { assert!(true) }
@@ -6,4 +6,5 @@ fn smoke() { assert!(true) }
 #[test]
 fn test_rom_1_works() {
     let mut x = Chip8Computer::new();
+    
 }