Refs #57

We don’t want to enforce an __init__.py without any imports but setup.py
must be runnable even before the module is installed.

Eager evaluation in the default settings caused some of the paths to
point to non-writable directories.
We already have a solution for this in form of the MEMOORJE_DATA_DIR
environment variable.

Refs #58

* we now use the real-world URL paths from the memoorje web app
* FRONTEND_LINKS items are now auto-prefixed with the ORIGIN setting
  so that we can set the URL paths once and users only have to update
  their ORIGIN setting

Refs #53

Refs #35

Refs #35

Refs #35

Refs #35, #57

Refs #35

Refs #35

refs #49

Refs #50

Refs #47

On each recipient change an email was sent to the capsule owner so far.
Now we rather create a journal entry. No mails are sent upon new journal
entries so far.

Refs #47