Add a way to eliminate empty lines

[Naatan]

t.Render("simple") seems to insert an empty line every other row, it would be nice if there were a simple way to disable this.

[justinfx]

I was actually hoping for this same feature :-)

[thorfour]

This was implemented with t.SetHideLines([]string{"betweenLine"}) just wasn't added to the docs

[justinfx]

@thorfour , thanks for pointing that out! I wish I had known about that, and that it was documented. Also, there hasn't been a new tag since 2014, so my glide dependency manager wasn't even pulling in a version that has this feature. Would be nice to see a new minor tag.

[thorfour]

Totally agree, I had to point dep to the latest revision today to pull in that change