News features and improvements (#8)

* added config file implementation, refactoring

* add gitignore

* improved test

* preperations for more metrics

* added resource metrics

* added first bgp metrics

* added asn as label for bgp metrics

* added prefix and message counts to bgp metrics

* simplified

* Update README.md

* added yaml dependency

* fixed go routine call

* added timeout

* clean up

* added TLS support

* set default api port for TLS

* added routes metric

* added missing log information

collector/helper.go

@@ -0,0 +1,20 @@
+package collector
+
+import (
+	"strings"
+
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+func metricStringCleanup(in string) string {
+	return strings.Replace(in, "-", "_", -1)
+}
+
+func descriptionForPropertyName(prefix, property string, labelNames []string) *prometheus.Desc {
+	return prometheus.NewDesc(
+		prometheus.BuildFQName(namespace, prefix, metricStringCleanup(property)),
+		property,
+		labelNames,
+		nil,
+	)
+}