Update: if there's no keys in some keygroup, takes {} as default
notes for empty group
rebuild version
class version of toml parser
OK, The new class_version_code seems to be cleaner
tag this 0.1.1
Merge branch 'dev'

* dev:
  tag this 0.1.1
  OK, The new class_version_code seems to be cleaner
  class version of toml parser
  rebuild version
  notes for empty group
  Update: if there's no keys in some keygroup, takes {} as default