Any files with external contributions need to be Apache2 licensed, since
I don't have any CLA, and need to release this on the ios store where
*GPL apps are a problem.
This allows switching the precision of Unix timestamps in YAML
frontmatter between second (the current beahaviour) and millisecond
(compatible with Dendron) precision.
I'm trying to get ride of this huge 'Note' class, and have it be quite
dumb. The idea is that we'll have separate Note subclasses - TxtNote,
MdNote, etc
Earlier one could never change a note type, and therefore its extension.
Now you can rename a note's filename to whatever and accordingly the
editor will change.
A warning message is shown when changing the file type.
Fixes#474
Certain Editors only support certain file formats. We can create an
editor either by -
* Giving it a Note, and letting it choose an editor based on the default
/ note metadata
* New Note with a file type
* New Note with a editor type + possible file type
