Various Fixes to multistructlog

- Force color output on structured-color formatter
- Add log levels and timestamps to output
- Fix reinitialization issue
- Cleanup/clarify README, add changelog

Change-Id: I11433f362e7c1ab8c1ee9fbca2081e136b57f22c
diff --git a/VERSION b/VERSION
index 227cea2..7ec1d6d 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.0.0
+2.1.0