Auto-import from Strava using IFTTT

[Daniel Besse]

Using Strava channel on IFTTT should allow push-like import of activities. Changes required:

1. on 3R: assign token to user to import without being logged-in
2. on IFTTT: recipe: trigger Strava new activity -> action Maker call 3record.de/u<id>/strava/ifttt/<token> with content/get parameter/...: activity URL
3. on 3R: find a way to import title when modified on Strava. Possibly, store info that activity still has Strava default title in "todo_actions" table and perform on user login or via cron jobs.

[Daniel Besse]

Prepared for IFTTT integration (not functional yet) see #100

→ <<cset 7692601e1c6f>>

[Daniel Besse]

Write access for IFTTT (see #100)

→ <<cset 7ba2d6bd8fd4>>

[Daniel Besse]

Rights for IFTTT (see #100)

→ <<cset 614e914f75ad>>

[Daniel Besse]

IFTTT auto-import (see #100)

• help procedure in about/strava
• fixes in logs, edit token, etc

→ <<cset 868c335996e7>>