ether/etherpad-lite — pull request #1342 by spcsser (2013-01-08 19:49:36+00:00)
Title: API & backend to list pads on epl instance

Introduced the ability to list all pads currently on this instance.
The pads can be retrieved via api calling ```/api/1.2.1/listAllPads```

How it works:
* Startup:
* retrieves dataset containing all known padIDs from db from the key ```pads``` into storage
* Runtime:
* opening pad:
* adds padID to storage if not existing
* saves storage to db
* creating pad
* adds padID to storage
* saves storage to db
* remove pad
* removes padID from storage
* saves storage to db

Limitations:
* Pads created before this feature are not listed