Merge branch 'dev'

Conflicts:
	tests/test_snsbase.py
v0.4.3
add contributor
snsgui: use clear code for NewChannel dialog
the requirements version change
The lastest version added
Merge pull request #73 from Kelvin-Zhong/master

update dependency versions
Merge branch 'master' into dev
Merge branch 'master' of github.com:hupili/snsapi
Merge branch 'master' into dev
Merge branch 'tkinter' of git://github.com/iptux/snsapi into iptux-tkinter