sine.threads 0.1.6

stoppable and restartable thread simply using an event

# Example

```python
from sine.threads import *

def func(stop_event):
while 1:
if stop_event.is_set():
break
# do your work

thread = StoppableThread(target=func)
thread.start()
# ...
thread.stop()
# thread.stopped() == True
thread.join()


thread = ReStartableThread(target=func, event_name='stop_event') # can specify the parameter's name
thread.start()
# ...
thread.stop()
thread.join()
# ...
thread.start()
# ...
thread.stop()
thread.join()
# ...
```


# Changelog

#### v0.1.6, 2018-10-7

* stop() become stop(timeout=0) to join the thread for convenience
and return whether it is alive.
* when the event_name is not specified, it is not strict to receive
the stop event any more, and it will be added to 'args'
so it can be receive by `*args'` or other argument


#### v0.1.5, 2018-9-11

* fix logic about join(), when directly join() without start() but stop()

#### v0.1.4, 2018-6-7

* ReStartableThread support join the old thread instance
* fix: ReStartableThread.start always creates new instance
* *improve comment and change to English*
* *change directory structure and update setup.py*
* *add tests.py*