Update app/hellosns/test-read-all.py

没有发现read_config函数，没学过python，感觉应该是load_config
Update app/hellosns/test-read-reply.py
Update app/hellosns/test-read-write-all.py
Merge pull request #40 from AntSworD/patch-1

Update app/hellosns/test-read-all.py
fix import path error

   * The snsapi dir is already in sys.path.
   No need to import from upper level module.
Merge branch 'master' of github.com:hupili/snsapi
Merge branch 'master' of git://github.com/hupili/snsapi into dev