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/.gitignore b/.gitignore
index 036ac49..f050059 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,6 @@
 *.pyc
 dist
+build
 .tox
 __pycache__
 *.egg-info