updated gitignore
updated gitignore

artych/ember-table,morten-holm/ember-table,ajgordo/ember-table,winweb/ember-table,hedgeserv/ember-table,Gaurav0/ember-table,Cuiyansong/ember-table,remerge/ember-table,winweb/ember-table,ilovezy/ember-table,andrewfan/ember-table,artych/ember-table,fuse-mars/ember-table,ajgordo/ember-table,nomadop/ember-table,nomadop/ember-table,kaikoehn/ember-table,ilovezy/ember-table,remerge/ember-table,phoebusliang/ember-table,Flexberry/ember-table,morten-holm/ember-table,Cuiyansong/ember-table,andrewfan/ember-table,fuse-mars/ember-table,shaunc/ember-table,Flexberry/ember-table,shaunc/ember-table,arenoir/ember-table,kaikoehn/ember-table,hedgeserv/ember-table,phoebusliang/ember-table,Gaurav0/ember-table