Miscalculation when using custom fonts

Thanks for developing this amazing script!

I just wanted to flag this issue in case anyone else has experienced it.

I only notice the issue when loading a custom font (from MyFonts) where the text is be balanced across too many lines, so text that could easily fit on 2 lines would render over 3 lines.

I think the issue can be traced back to the **nowrapHeight** calculation. I've fixed the issue for myself by changing line 313 from `$this.css('line-height', 'normal');` to `$this.css('line-height', '1');`

Inspect line 313 where the nowrapHeight calculation sets line-height, then reproduce the issue with a custom MyFonts font and text that should fit on two lines. Done means the text no longer wraps across too many lines when the reported line-height adjustment is applied.

Written by the indexing model from the issue text.