Merge pull request #117 from prometheus/beorn7/release

Cut release 0.5.0.

Author: beorn7

CHANGELOG.md

@@ -1,3 +1,21 @@
+## 0.5.0 / 2015-05-06
+* [BUGFIX] Removed a weakness in the fingerprinting aka signature code.
+  This makes fingerprinting slower and more allocation-heavy, but the
+  weakness was too severe to be tolerated.
+* [CHANGE] As a result of the above, Metric.Fingerprint is now returning
+  a different fingerprint. To keep the same fingerprint, the new method
+  Metric.FastFingerprint was introduced, which will be used by the
+  Prometheus server for storage purposes (implying that a collision
+  detection has to be added, too).
+* [ENHANCEMENT] The Metric.Equal and Metric.Before do not depend on
+  fingerprinting anymore, removing the possibility of an undetected
+  fingerprint collision.
+* [FEATURE] The Go collector in the exposition library includes garbage
+  collection stats.
+* [FEATURE] The exposition library allows to create constant "throw-away"
+  summaries and histograms.
+* [CHANGE] A number of new reserved labels and prefixes.
+
 ## 0.4.0 / 2015-04-08
 * [CHANGE] Return NaN when Summaries have no observations yet.
 * [BUGFIX] Properly handle Summary decay upon Write().

VERSION

@@ -1 +1 @@
-0.4.0
+0.5.0