cli: don't prompt after quit command
cli: show type of current object in prompt
Run PANDA scrypt processing in subprocess on 32-bit.

The GC is having issues on 32-bit systems (I think) and the biggest
allocation, by far, is the PANDA scrypt processing. This change causes
Pond to exec /proc/self/exec and feed the input to be hashes into a
subprocess. Thus that address space can be completed cleaned up.

We'll have to see whether this helps the reported issues.
Don't write CLI context types in ID colours.
Merge branch 'ebfe-cli-tweaks'
cli: add identity command
gui: add "Clear" button to Activity Log pane
Implement the updated axolotl ratchet (disabled for now).

There was a weakness in the initial revision of axolotl which is fixed
in this update. However, it's disabled for now while I think about
whether anything else needs to go into this version update.
Merge branch 'ebfe-cli-identity'
Add a little padding around the log buttons.
Merge branch 'leif-clear-button'
Clear the log rather than creating a new one.

Clearing can be done with the lock held, avoiding a race if
other goroutines are concurrently writing.
Remove revocations from the outbox once sent.
Add --cli flag to use the CLI.
Fix crash when adding a subline to a listUI entry.

This caused a crash when the user was revoked by a contact because we
would try to set the subline text of a label that hadn't been created.