Haf

- update lock support to decorator
python
from haf.utils import locker
lock
def lock_func():
pass

- support pycase
python
from haf.mark import test, skip, parameterize
test
skip
parameterize([{}])

- bug fix : cannot show png at readme
- add gif to doc/show

- make the plugin mode

- make plugin manager mode
- add hooks to support add_option and so on