function coverage(oSummary) {
		oSummary.lines.coverage = percent(oSummary.lines.missed, oSummary.lines.total);
		oSummary.branches.coverage = percent(oSummary.branches.missed, oSummary.branches.total);
	}
Calculates the line and branch coverage for the summary.

@param {object} oSummary The summary