conver more tags in xml

only append () to function's uid

also convert ref tag when refid is empty

add yaml mime, remove service mapping step (#3)

fix return code is always 0 (#1)

* fix return code is always 0

* allow unmatched property in YAML

filter one more copyright comments

format uid for service

update service page uid

mapping file generation: fix some bug

fix mapping: children might be null