Drop2PI 0.0.9.2

1. Support Python2 and Python3.
2. Better folder download performance.
3. Fix some bugs like move folder or rename folder.
4. Add simple downloader and uploader for only download files.

Drop2PI 0.0.9

1. Add a simple mm cache so will not request server every time.
2. Fix some bugs that will not download right.
3. Add simple interface to download big file.
4. Add simple lock and simple queue.

Drop2PI 0.05

1. Make it OO
2. Read config from $HOME dir
3. Fix delete local file problem
4. Work as a lib, easy change event handler