Add a mod time request method to the reader.
Add a mod time request method to the reader.

git-svn-id: d1efbf6e723fdb101d10d8502afaf9e889ff11cb@479 b5fa9d6c-a76f-4ffd-b3cb-f825fc41095c

fonttools/fonttools,googlefonts/fonttools,adrientetar/robofab