Remove links to getwebgo.com.
Remove links to getwebgo.com.

The site is dead, and the docs will be moving to Github pages soon.

hoisie/web,yjp211/web,redhotpenguin/web,epigos/web,no2key/web,williamzhang2013/web,fredatgithub/web,riversea2015/web,devfreesg/web,tempbottle/web-1,mapix/web,zouchao2010/web,ginashi/web