Documents are moved into CPAN

add dump operator

Revert "add norw package descriptor and field descriptor and rw package descriptor is default, rw field descriptor is default"

update logical op

add {} array init syntax

add cmp and <=> doc

yacc update

update yacc

add ref operator

add norw package descriptor and field descriptor and rw package descriptor is default, rw field descriptor is default

improve native api design

add new native apis

remove all macros

SPVM_SUCCESS become 0, SPVM_EXCEPTION become 1

cleanup SPVM document