forceLineBreaks -> lineBreakMode

[dcporter]

I think I've got the code to a point where it's very reliable at doing <p> line-breaks, so I think it makes sense to allow the developer to choose between that and <div> since it'll be very little extra effort. I'll add <br> as a (still highly experimental) mode with in that, which will allow me to get rid of the annoyingly-named forceLineBreaks.

Any objections?