add use dev token for yinxiang

[youqingkui]

i use the python sdk example can work in yinxiang, so i change this

developer_token = "my developer token"

# Set up the NoteStore client 
client = EvernoteClient(token=developer_token)
note_store = client.get_note_store()

# Make API calls
notebooks = note_store.listNotebooks()
for notebook in notebooks:
    print "Notebook: ", notebook.name