Changes needed for Python 3.7

[Robert Tari]

Starting from Python 3.7 "async" is a reserved word, so the async.py module will not import. Here is what needs to change:

1. async.py:
rename async.py to myasync.py

2. whereami.py:33
"from async import async_function" --> "from myasync import async_function"

3. debian/md5sums:54
f0cd9a66d9ce38828748bc37c230e693 opt/extras.ubuntu.com/my-weather-indicator/share/my-weather-indicator/async.py --> f0cd9a66d9ce38828748bc37c230e693 opt/extras.ubuntu.com/my-weather-indicator/share/my-weather-indicator/myasync.py

[Jan Wester (j-vester)]

Since ubuntu disco dingo (19.04) is released, and disco dingo is delievered with python 3.7, my-weather-indicator does not work any longer. Looking in the crash file definitively proves that the problem is the one described above.

[Jan Wester (j-vester)]

my-weather-indicator now seems to work for systems that was upgraded to disco dingo and where the my-weather-indicator earlier worked. but it does not seem to work on systems that were installed without webkit-3.0. and that is not installed on disco dingo from start. It says Depends on: gir1.2-webkit-3.0. Disco dingo is delievered with gir1.2-webkit2-4.0