Fixed some content on README.md
Fixed some content on README.md

ebussieres/pebble,PebbleTemplates/pebble,samlanning/pebble,dotneet/pebble,jcarvalho/pebble,PebbleTemplates/pebble,DanStout/pebble,mbosecke/pebble,hectorlf/pebble,chambas/pebble