Flask study program: MicroBlog web system

##See Details for Every Day Job for this program:

** Day-1: http://mp.weixin.qq.com/s?__biz=MjM5MDQ1NTA1MQ==&mid=521107672&idx=1&sn=904c7b12ba840af6d720e8f19b383834#rd

** Day-2: http://mp.weixin.qq.com/s?__biz=MjM5MDQ1NTA1MQ==&mid=2668591325&idx=1&sn=ef96b24afafe04af5441059e02149b25#rd

** Day-3: http://mp.weixin.qq.com/s?__biz=MjM5MDQ1NTA1MQ==&mid=2668591331&idx=1&sn=f0b823a446b5160ca01b177d09fbdc3f#rd

** Day-4: http://mp.weixin.qq.com/s?__biz=MjM5MDQ1NTA1MQ==&mid=521107689&idx=1&sn=90b734318b82155d864baa3789cfd51d#rd

** Day-5: http://mp.weixin.qq.com/s?__biz=MjM5MDQ1NTA1MQ==&mid=521107695&idx=1&sn=db82ec36e9a6559bf367a79831328e1a#rd

** Day-6: http://mp.weixin.qq.com/s?__biz=MjM5MDQ1NTA1MQ==&mid=2668591348&idx=1&sn=f03a1efd2cdea983631a42b52477b296#rd

** Day-8: http://mp.weixin.qq.com/s?__biz=MjM5MDQ1NTA1MQ==&mid=521107702&idx=1&sn=47f08b6f07fe3d5d40eceae275d060be#rd