New Operation: Lines

[neocotic]

Add a new lines operations which simply counts the number of lines that it contains.

Optional

Add a secondary operation that ignores blank lines (e.g. linesIgnoreBlank).

[neocotic]

I don't think that this will be so easy to do since the DOM may have more lines than what the user sees. For example:

foo bar

Could be presented based on the following HTML:

<p>
  foo

  bar  
</p>

Line count of p would should 3 where the user would expect 1. I'm going to have to rethink this so I'm removing from 1.2.7.