Fix typo in conv_layer.png

fix "No newline at end of file"

repair dead links

repair 最后一行空行 in index.cn.html

	修改：     README.md

change "新手入门" to "线性回归"

	修改：     README.cn.md

Update package.json to fix security vulnerability

Update mirror registry server addr

add comment to mnist client.py

fix recognize_digits infer

fix the white space issue.

Update the fit_a_line/infer.py to use the uci_housing.model

Add quick start code

Update code

Website deploy scripts