use OrderedDict and store original lines/content lines so I can
reconstruct later
return actual Markdown object and not just Meta attribute
return note object so we can use it later
start of the actual logic to write and consume the guid metadata
apparently note doesn't update in place
meta keys are lower case
match notes by guid, also write out guid metadat
Merge pull request #7 from dalejung/evernote_guid

Evernote guid