Non-ASCII character fix ('\xc3')

```
Getting debugDetails, debugLogging, result is False
Traceback (most recent call last):
  File "main.py", line 24, in <module>
    import qt5reactor
  File "/usr/share/aether/qt5reactor.py", line 28
SyntaxError: Non-ASCII character '\xc3' in file /usr/share/aether/qt5reactor.py on line 28, but no encoding declared; see http://python.org/dev/peps/pep-0263/ for details
```

Solution:

add `#coding: utf8` to qt5reactor.py