function getTrimmedWidth(item) {
			return Math.max(0, item.width - item.leadingCut - item.trailingCut);
		}
Converts an array of strings (or inline-definition-objects) into a set of inlines
and their min/max widths
@param  {Object} textArray - an array of inline-definition-objects (or strings)
@param  {Number} maxWidth - max width a single Line should have
@return {Array} an array of Lines