Initial code for toodledo-todoist conversion
Add task limit warning for Todoist
Working version!

- utf-8 encoding so double-back-quote can be written to file
- tested import of the text export folder
- add tags for un-importable stuff (repeat text, wrong folder)
- process due dates
- process tags

next step is to automatically split up files if the count of
elements is too many for a single project
ignore .zip file backup from todoist
Don't import completed items. Include notes, fix multiline notes (separated by tabs in todoist)
Merge branch 'master' of github.com:/cod3monk3y/todoist