- Do not crash because of low disk space
- Notify the user whenever it happens
- A few functions now return a boolean instead of nothing
- Config.silent_set is Config.set_and_save without toggle and returning
  strings. It is used whenever we don’t need set_and_save
- Config.set_and_save now returns a tuple (that can be passed directly
  to core.information())

TODO: display the precise error to the user (instead of “unable to…”)

- separate_history, defaults to false

- The input is split in two parts: on the left is what the user enters,
    on the right is the first match (the right part has a different
    color)
- Start and cancel a search with ^R
- Validate a search with enter, then press another time enter to send

- CommandInput and MessageInput now inherit from the HistoryInput class
  and share some methods

(it should be in an external tool, not _inside_ poezio)

- Refactor the message handlers to be more readable
- Add a group_corrections tab-specific option (#2229)
- Fix issues with /correct in private tabs and conversation tabs

also:
- fix Message.__str__/repr
- fix a traceback with user gaming

- configuration options
- theming options
- /gaming

- Added as always new theming variables:
    CHAR_ROSTER_MOOD, CHAR_ROSTER_ACTIVITY (a SNOWMAN!)
    COLOR_ROSTER_MOOD, COLOR_ROSTER_ACTIVITY
- Added two new notification types in Theme.INFO_COLORS (mood/activity)
- Added new configuration options:
    display_mood/activity/tune_notifications (those can be set for a
    specific JID)
    enable_user_tune/nick/activity/mood
- Added /activity and /mood commands, with completions
- Moved the old /activity to /last_activity
- Details are show in the ContactInfoWin if there is room, or with "i"
  on a contact in the roster.

- add a use_pep_nick boolean option
- use it as a nickname for roster contacts, but it does not
    supercede the user-defined handle
- send a <nick/> at the beginning of a normal chat
- not implemented in MUC (wontfix)

- Add new theming options
- Show the tune in the roster (both in contact line and infowin)
- add an option to show tunes as info messages

- Add a “prepend” attribute to the Line tuple

I’m not sure of the impact of this on performance (we parse the message
yet another time)

(add a new theming option, too)

Also:
- Add get_conversation_messages() to PluginAPI
- Make plugins_autoload colon-separated instead of space-separated
    (for consistency)
- Replace a JID() with a safeJID() in the uptime plugin

- add methods related to timed events to the PluginAPI
- remove parse_command_args_to_alias because str.format does that, and
  better
→ update the alias plugin

(and tell what is failing)

- Try to reduce the use of the “core” object in the plugins
- New “api” member for each BasePlugin which is a wrapper around
    the unique PluginAPI object. (instead of having the methods
    directly in BasePlugin and then calling the PluginManager)
- Documented methods with rst (for sphinx)

(THE NAMESPACE WAS NOT PRESENT ANYMORE)