Rearranged some internal initialization to support multiple files being run

scripts/test/separate-exports.toy

@@ -0,0 +1,11 @@
+//test exports
+var field: int = 42;
+
+fn function() {
+	return 69;
+}
+
+export field;
+export function;
+
+print "All good";

scripts/test/separate-imports.toy

@@ -0,0 +1,10 @@
+//test imports
+import field;
+//import function;
+
+//assert field == 42, "import field failed";
+
+//assert function() == 69, "import function failed";
+
+print "All good";
+