README fix broken links in features section
README fix broken links in features section

joshsoftware/github,wicky-info/github,anabhilash619/github,piotrmurach/github,samphilipd/github,peter-murach/github,durai145/github,yaoxiaoyong/github,MalachiTatum/github,befairyliu/github,davengeo/github,cocktail-io/github,firstval/github