Update plugins.md. Added Jekyll Flickr Plugin.
Update plugins.md. Added Jekyll Flickr Plugin.

brint/jekyll,alfredxing/jekyll,derekgottlieb/jekyll,alex-kovac/jekyll,darwin/jekyll,jaybe-jekyll/jekyll,yihangho/jekyll,codeclimate-testing/jekyll,getandpost/jekyll.github.io,jaybe-jekyll/jekyll,Kinghack/kinghack.github.com,Strangehill/jekyll,floydpraveen/jekyll,alex-kovac/jekyll,fulldecent/jekyll,derekgottlieb/jekyll,jeffkole/jekyll,jeffkole/jekyll,tillgrallert/jekyll,tillgrallert/jekyll,gencer/jekyll,aarvay/jekyll,stomar/jekyll,rlugojr/jekyll,darwin/jekyll,noikiy/jekyll,rlugojr/jekyll,yhironaka/yhironaka.github.io,zsyed91/jekyll,derekgottlieb/jekyll,Strangehill/jekyll,xiebinhqy/jklly_china,princeofdarkness76/jekyll,jeffkole/jekyll,ryanshaw/jekyll,ryanshaw/jekyll,xcatliu/jekyllcn,aarvay/jekyll,xiebinhqy/jklly_china,tillgrallert/jekyll,rebornix/jekyll,princeofdarkness76/jekyll,aarvay/jekyll,princeofdarkness76/jekyll,pmarsceill/jekyll,yihangho/jekyll,ajhit406/jekyll,floydpraveen/jekyll,darwin/jekyll,ducktyper/jekyll,ryanshaw/jekyll,nasht00/jekyll,princeofdarkness76/jekyll,tomjohnson1492/jekyll,noikiy/jekyll,tomjohnson1492/jekyll,tillgrallert/jekyll,larryfox/jekyll,nasht00/jekyll,alex-kovac/jekyll,noikiy/jekyll,jaybe-jekyll/jekyll,zsyed91/jekyll,x-way/jekyll,chrisfinazzo/jekyll,xiebinhqy/jklly_china,xcatliu/jekyllcn,ajhit406/jekyll,tillgrallert/jekyll,fulldecent/jekyll,nasht00/jekyll,bsmr-ruby/jekyll,brint/jekyll,ZDroid/jekyll,rebornix/jekyll,mrb/jekyll,fulldecent/jekyll,tomjohnson1492/jekyll,stomar/jekyll,ZDroid/jekyll,xiebinhqy/jklly_china,fulldecent/jekyll,rasa2011/rasa2011.github.io,alex-kovac/jekyll,jekyll/jekyll,zsyed91/jekyll,ajhit406/jekyll,zsyed91/jekyll,chrisfinazzo/jekyll,larryfox/jekyll,ducktyper/jekyll,rlugojr/jekyll,pmarsceill/jekyll,ajhit406/jekyll,brint/jekyll,getandpost/jekyll.github.io,alfredxing/jekyll,Strangehill/jekyll,gencer/jekyll,chrisfinazzo/jekyll,rlugojr/jekyll,alfredxing/jekyll,floydpraveen/jekyll,pmarsceill/jekyll,Strangehill/jekyll,x-way/jekyll,xcatliu/jekyllcn,gencer/jekyll,darwin/jekyll,stomar/jekyll,Strangehill/jekyll,x-way/jekyll,chrisfinazzo/jekyll,floydpraveen/jekyll,mrb/jekyll,Kinghack/kinghack.github.com,gencer/jekyll,yihangho/jekyll,ryanshaw/jekyll,Kinghack/kinghack.github.com,rebornix/jekyll,jekyll/jekyll,tomjohnson1492/jekyll,xcatliu/jekyllcn,jeffkole/jekyll,nasht00/jekyll,rasa2011/rasa2011.github.io,noikiy/jekyll,alex-kovac/jekyll,codeclimate-testing/jekyll,larryfox/jekyll,bsmr-ruby/jekyll,brint/jekyll,bsmr-ruby/jekyll,alfredxing/jekyll,ZDroid/jekyll,jekyll/jekyll,jaybe-jekyll/jekyll,rasa2011/rasa2011.github.io,bsmr-ruby/jekyll,jekyll/jekyll,tomjohnson1492/jekyll,gencer/jekyll,getandpost/jekyll.github.io,mrb/jekyll,pmarsceill/jekyll,x-way/jekyll,ducktyper/jekyll,codeclimate-testing/jekyll,derekgottlieb/jekyll,mrb/jekyll,stomar/jekyll