Further on the path toward self-awareness.

Mostly:

  * Merciless refactoring of trans.rs so that trans_call can work for
    self-calls as well as other kinds of calls

Also:

  * Various changes to go with having idents, rather than exprs, in
    expr_call_self AST nodes
  * Added missing case for SELF token to token.to_str()

src/comp/front/parser.rs

@@ -887,10 +887,12 @@ impure fn parse_bottom_expr(parser p) -> @ast.expr {
         }
 
         case (token.SELF) {
+            log "parsing a self-call...";
+
             p.bump();
             expect(p, token.DOT);
             // The rest is a call expression.
-            auto e = parse_bottom_expr(p);
+            auto e = parse_ident(p);
             auto pf = parse_expr;
             auto es = parse_seq[@ast.expr](token.LPAREN,
                                            token.RPAREN,