enabling inheritance for special methods
enable 'obj-get' to accept attribute arg as string value
'getattr' function name translation
function: 'obj-hasattr'
'hasattr' function name translation
function: 'obj-isinstance'
'isinstance' function name translation
add set and get special methods to list
function: 'data-descriptor-p'
function: 'non-data-descriptor-p'
function: 'py-object-p'
fix 'obj-hasattr'
fix 'obj-isinstance'
remove all of the internal attr representation code, attrs stored as
cons cells
py ast raise
raise transform
updated tangled files
error symbol for AttributeError
macro: 'pyel-def-error'
use 'pyel-def-error' instead