Limit the number of messages

[srph]

Limiting has its own share of complexity, however we're trying to keep this library simple. I'd like to hear out anybody's opinion regarding this matter.

• Is this an important feature?
• In my opinion, limiting a drawer to display certain number of items by starting from the end to n would make sense. The other one (from the first to n) doesn't.
• We can make do both, but it would bloat the library. And probably worsen our API.

* I did attempt to implement this, but the questions I've raised myself while writing it were bothering.