Use .jpg in avatars

client/views/avatar/avatar.coffee

@@ -10,5 +10,5 @@ Template.avatar.helpers
 		random = Session.get('AvatarRandom')
 		if not username? and this.userId?
 			username = Meteor.users.findOne(this.userId)?.username
-		url = "#{Meteor.absoluteUrl()}avatar/#{username}?_dc=#{random}"
+		url = "#{Meteor.absoluteUrl()}avatar/#{username}.jpg?_dc=#{random}"
 		return url

server/methods/setAvatarFromService.coffee

@@ -8,7 +8,7 @@ Meteor.methods
 		{image, contentType} = RocketFile.dataURIParse dataURI
 
 		rs = RocketFile.bufferToStream new Buffer(image, 'base64')
-		ws = RocketFileAvatarInstance.createWriteStream user.username, contentType
+		ws = RocketFileAvatarInstance.createWriteStream "#{user.username}.jpg", contentType
 		ws.on 'end', Meteor.bindEnvironment ->
 			Meteor.users.update {_id: user._id}, {$set: {avatarOrigin: service}}
 
@@ -22,7 +22,7 @@ Meteor.methods
 
 		user = Meteor.user()
 
-		RocketFileAvatarInstance.deleteFile user.username
+		RocketFileAvatarInstance.deleteFile "#{user.username}.jpg"
 
 		Meteor.users.update user._id, {$unset: {avatarOrigin: 1}}
 		return