Implement StackedWidget: fit size to current widget
Add three static OAuth interface to class Plugin.
add sina account
main.py

Now can execute app via any link
Setting window slightly changed
Update readme
GroupBox stylesheet in tweet_widget.py
add account
bugfix: when app is launched for the first time

Create database table if not exists.
Create default config file.
Imporve: add account
Imporve: delete account