Rename "Local" to "Name" when referring to variables during compilation

* Variables were previously named "Local"s because they described a
  local variable - however, this is kind of a misnomer because it
  handles globals as well. This has been changed pretty much everywhere
  when appropriate (hopefully).
* Renamed obj/names.rs to obj/reserved.rs, freeing up the "names" module
  for the new Names handle
* Renamed obj/locals.rs to obj/names.rs, see above

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>

src/obj/reserved.rs

@@ -0,0 +1,74 @@
+//! Reserved names for object members.
+
+use crate::obj::sym::{Sym, SymRef, global_sym, global_sym_ref};
+use once_cell::sync::Lazy;
+
+macro_rules! name {
+    ($name:ident, $text:expr $(,)?) => {
+        pub static $name: Lazy<NameInfo> = Lazy::new(|| {
+            let name = $text;
+            let sym = global_sym(name.to_string());
+            NameInfo { name, sym, }
+        });
+    }
+}
+
+pub struct NameInfo {
+    pub name: &'static str,
+    pub sym: Sym,
+}
+
+impl NameInfo {
+    pub fn sym_ref(&self) -> SymRef {
+        global_sym_ref(self.sym)
+    }
+}
+
+//
+// Types
+//
+name!(INT_NAME, "Int");
+name!(TY_NAME, "Type");
+name!(SYM_NAME, "Sym");
+
+//
+// Members
+//
+name!(TY_MEMBER_NAME, "__type__");
+name!(CALL_MEMBER_NAME, "__call__");
+name!(NAME_MEMBER_NAME, "__name__");
+name!(GET_ATTR_MEMBER_NAME, "__get_attr__");
+name!(SET_ATTR_MEMBER_NAME, "__set_attr__");
+name!(SELF_MEMBER_NAME, "__self__");
+name!(FUNC_MEMBER_NAME, "__func__");
+
+//
+// Predefined VM-aware symbols
+//
+name!(SCOPE_NAME, "__scope__");
+
+//
+// Builtin functions
+//
+//name!(REPR_FUN_NAME, REPR_FUN_SYM, "repr");
+//name!(GET_LOCAL_FUN_NAME, GET_LOCAL_FUN_SYM, "get_local");
+//name!(SET_LOCAL_FUN_NAME, SET_LOCAL_FUN_SYM, "set_local");
+
+//
+// Builtin constants
+//
+name!(TRUE_NAME, "true");
+name!(FALSE_NAME, "false");
+name!(NIL_NAME, "nil");
+
+// Operator function names
+name!(EQ_EQ_OP_NAME, "__eq__");
+name!(LT_OP_NAME, "__lt__");
+name!(GT_OP_NAME, "__gt__");
+name!(LT_EQ_OP_NAME, "__le__");
+name!(GT_EQ_OP_NAME, "__ge__");
+name!(PLUS_OP_NAME, "__add__");
+name!(MINUS_OP_NAME, "__sub__");
+name!(TIMES_OP_NAME, "__mul__");
+name!(DIV_OP_NAME, "__div__");
+