Squashed commit of the following:
Squashed commit of the following:

commit ace0925604e3519fb09da15d506fcd42ce354736
Author: zengdaqian <zengdaqian@zengdaqiandeMacBook-Pro.local>
Date:   Tue Jun 27 12:02:58 2017 +0800

    add init func to TableViewSection

jjjjjeffrey/JeffreyKit,jjjjjeffrey/JeffreyKit