Collect metrics for all mpackages

Property definitions

nitc $ ReadmeMetrics :: collect_metrics
	# Collect metrics for all `mpackages`
	fun collect_metrics(mpackages: Collection[MPackage]) do
		for mpackage in mpackages do
			var metric = new ReadmeMetric(mpackage)
			metric.collect_metrics
			self[mpackage] = metric
		end
	end
src/metrics/readme_metrics.nit:102,2--109,4