Rename packages to global modules.

benches/engine.rs

@@ -23,7 +23,7 @@ fn bench_engine_new_raw_core(bench: &mut Bencher) {
 
     bench.iter(|| {
         let mut engine = Engine::new_raw();
-        engine.load_package(package.get());
+        engine.register_global_module(package.as_shared_module());
     });
 }
 

benches/eval_module.rs

@@ -20,7 +20,7 @@ fn bench_eval_module(bench: &mut Bencher) {
 
     let module = Module::eval_ast_as_new(Default::default(), &ast, &engine).unwrap();
 
-    engine.register_module("testing", module);
+    engine.register_static_module("testing", module);
 
     let ast = engine
         .compile(