Add maintainers file

Closes hyperledger-labs#58

Signed-off-by: James Taylor <jamest@uk.ibm.com>

MAINTAINERS.md

@@ -0,0 +1,17 @@
+## Maintainers
+
+### Active Maintainers
+
+| Name          | GitHub   | email               |
+|---------------|----------|---------------------|
+| Josh Kneubuhl | jkneubuh | jkneubuh@us.ibm.com |
+| James Taylor  | jt-nti   | jamest@uk.ibm.com   |
+
+### Retired Maintainers
+
+| Name | GitHub | email |
+|------|--------|-------|
+|      |        |       |
+
+---
+<a rel="license" href="http://creativecommons.org/licenses/by/4.0/"><img alt="Creative Commons License" style="border-width:0" src="https://i.creativecommons.org/l/by/4.0/88x31.png" /></a><br />This work is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by/4.0/">Creative Commons Attribution 4.0 International License</a>