- updated to 1.81
- Fix overly-enthusiastic parenthesis unroller (RT#99503)

revision 1.80 2014-10-05
----------------------------
- Fix erroneous behavior of is_literal_value($) wrt { -ident => ... }
- Explicitly croak on top-level special ops (they didn't work anyway)

revision 1.79 2014-09-25
----------------------------
- New exportable functions: is_literal_value($) and is_plain_value($)
- New attribute 'escape_char' allowing for proper escape of quote_chars
present in an identifier
- Deprecate { "" => \... } constructs
- Treat { -value => undef } as plain undef in all cases
- Explicitly throw on { -ident => undef }