Tagging: Should be able to add custom tags to notes

[elimisteve]

Those tags should auto-complete as the user is typing. Preferably the user should also be able to see a complete list of their tags.

Let's not include id:.. nor created:... tags in the "complete" list, but if the user starts to type them, let's auto-complete them last.

[elimisteve]

Slick-looking component for doing just this: https://github.com/olahol/react-tagsinput