#7 misc todos from johannes

[nyet]

Inherited from johannes:

Abstracted selectable interfaces
Better HTML parsing
Cleanup API
Replace/Add options
Dynamic target replacement (ie always _top for this user, always _new for another one)
Move posts between forums
Merge re-post code into edit somehow
Rate limit posts (via f_duppost)
Ignore user feature

DUP into seperate bugs if work starts on them.