snsapi: add Tkinter GUI
snsgui: add auth_info in new channel dialog
snsgui: typo
snsgui: post status is working now
snsgui: support forward and reply
snsgui: add theme support
snsgui: add more email provider
snsgui: add document for snsgui
Merge pull request #63 from iptux/tkinter

snsgui - a simple gui for snsapi using Tkinter