added menu_name to TimberMenu Object
sanity check for is_url
re-organized filter list
external images get base64 treatment so they are absolute
wMerge branch 'master' of github.com:bryanaka/timber into bryanaka-master

* 'master' of github.com:bryanaka/timber:
  added menu_name to TimberMenu Object
Incorporating full menu info from nudge from @bryanaka and @patrickmatsumura