Font:getWrap
Gets formatting information for text, given a wrap limit.

This function accounts for newlines correctly (i.e. '\n').
width, wrappedtext = Font:getWrap( text, wraplimit )
text string The text that will be wrapped.
wraplimit number The maximum width in pixels of each line that ''text'' is allowed before wrapping.
width number The maximum width of the wrapped text.
wrappedtext table A sequence containing each line of text that was wrapped.