This fixes an oversight in _fakeble.py for which the enum value is not recognized as an int when adding the advertised PA level in a BLE payload.
Full traceback error
```
Traceback (most recent call last):
File "examples/fake_ble_test.py", line 196, in
while set_role():
File "examples/fake_ble_test.py", line 174, in set_role
master(*[int(x) for x in user_input[1:]])
File "examples/fake_ble_test.py", line 75, in master
ble.advertise(battery_service.buffer, data_type=0x16)
File "/home/pi/github/env/lib/python3.7/site-packages/pyrf24/fake_ble.py", line 616, in advertise
payload = self.whiten(self._make_payload(payload))
File "/home/pi/github/env/lib/python3.7/site-packages/pyrf24/fake_ble.py", line 530, in _make_payload
pa_level = chunk(struct.pack(">b", self._radio.pa_level), 0x0A)
struct.error: required argument is not an integer
```
Also fixed some pylint & spelling errors in _streamingdata.py example.
This fixes an oversight in _fakeble.py for which the enum value is not recognized as an int when adding the advertised PA level in a BLE payload.
Full traceback error
``` Traceback (most recent call last): File "examples/fake_ble_test.py", line 196, inAlso fixed some pylint & spelling errors in _streamingdata.py example.