Update Contributing.md
Update Contributing.md

Fix link to Template repository.
Add link to Jekyller.
roadev/jekyll_caliruby_meetup,innovateboliu/innovateboliu.github.io,easy-deep-learning/event-emitter,bardt/devtools_outside_in,belbiy/eugene-intro,zolotyh/spa-pres,popo1221/shower,AnalogJ/capsulecd-slides,first-wanderer/shower,Ladicle/shower,alexws54tk/shower,easy-deep-learning/event-emitter,Robsteranium/grafting-linked-data-slides,myshov/story_of_vim,Ladicle/shower,shengxiang/shower,belbiy/eugene-intro,rakchaev/assembly-pyatnica2016,roadev/jekyll_caliruby_meetup,RubenVerborgh/shower,Robsteranium/grafting-linked-data-slides,alexws54tk/shower,AnalogJ/capsulecd-slides,shower/core,popo1221/shower,first-wanderer/shower,rakchaev/assembly-pyatnica2016,rom4j/shower,bardt/devtools_outside_in,tenebricosa/machine,MammaSonnim/git-show,tenebricosa/machine,zolotyh/spa-pres,CaraWang/2016-talk-cnyes-elasticsearch,innovateboliu/innovateboliu.github.io,myshov/story_of_vim,shengxiang/shower,rakchaev/offline_frontend-mix2016,MammaSonnim/git-show,rakchaev/offline_frontend-mix2016,RubenVerborgh/shower,CaraWang/2016-talk-cnyes-elasticsearch