Cleaned up app docs.

git-svn-id: https://www.libavg.de/svn/trunk/libavg@9244 44470bb9-56e9-0310-a0f8-c586564d3dc6
Fixed minor typo in samples/app_complete.py

git-svn-id: https://www.libavg.de/svn/trunk/libavg@9245 44470bb9-56e9-0310-a0f8-c586564d3dc6