Merge pull request #51 from nodiscc/optional-archiveorg

make archive.org integration optional (ARCHIVE_ORG option, defaults to false)
add READITYOURSELF_URL config variable
add README
add linklist_plugins placeholder config variable, set readityourself default url to readityourself.net
test raintpl condition, display readityourself link if plugin enabled
fix typo in url
urlencode
this is not how it works this is not how any of it works