Reimplement (.method object . args) syntax

Reimplement (.method object . args) syntax
Using PS:FUNCALL, PS:CHAIN, or ((PS:SLOT-VALUE ...) ...) for method
invocation is rather unwieldy for something so common in
javascript. This reenables the convenient (.method ...) call syntax in
a way that seems reasonably clean.

This may have subtle issues with the lexical-let variable renamer and
such, but my cursory skimming of the new compiler source doesn't seem
to indicate any serious issues.