Added support for Clojars versioning
Added support for Clojars versioning

Since Clojars now have `clojar/latest-version.json', this change uses
that data to parse out the version and create a version badge.

Built on top of the work done by @erwan!

rexxars/shields,PeeHaa/shields,andyshinn/shields,zackp30/shields,adjohnson916/shields,sanemat/shields,rayners/shields,badges/shields,dnvriend/shields,marktopper/shields,andyshinn/shields,jennifer421/shields,zackp30/shields,pine613/shields,tomap/shields,wanji/shields,gcochard/shields,Miovision/shields,freezy-sk/shields,piperchester/shields,jennifer421/shields,freezy-sk/shields,mateusrevoredo/shields,rmuhamedgaliev/shields,badges/shields,HossainKhademian/Shields,krak3n/shields,roomthily/shields,igormukhingmailcom/shields,igormukhingmailcom/shields,IveWong/shields,workhorsy/shields,MGDIS/shields,MatzFan/shields,spalger/shields,adjohnson916/shields,pine613/shields,mahirk/shields,allenmanning/shields,roomthily/shields,marktopper/shields,Borgaard/shields,clintonhalpin/shields,RIAEvangelist/shields,mahirk/shields,sebyddd/shields,malditogeek/shields,bishop335/shields,sanemat/shields,IveWong/shields,Miovision/shields,allenmanning/shields,badges/shields,sebyddd/shields,tomap/shields,MatzFan/shields,piperchester/shields,Daniel15/shields,Daniel15/shields,Borgaard/shields,mkiisoft/shields,wanji/shields,rayners/shields,mkiisoft/shields,clintonhalpin/shields,workhorsy/shields,gcochard/shields,RIAEvangelist/shields,rexxars/shields,MGDIS/shields,HossainKhademian/Shields,krak3n/shields,mateusrevoredo/shields,Miovision/shields,dnvriend/shields,spalger/shields,bishop335/shields,PeeHaa/shields,rmuhamedgaliev/shields,malditogeek/shields