Merge branch 'master' of https://github.com/qpython-android/qpython

Merge branch 'master' of https://github.com/qpython-android/qpython

Merge branch 'master' of https://github.com/qpython-android/qpython

Merge branch 'master' of https://github.com/qpython-android/qpython

Update email

Update website

Update website

Update website

add doc nav

Update notify API for new release