Add README and Update MAINTAINERS

Added a README that provides an overview of the VPD parsers
that this repository hosts.

Proposing Jinu and myself as maintainers.

Signed-off-by: Santosh Puranik <santosh.puranik@in.ibm.com>
Change-Id: If7b65bd5948994cf3edddfdc61b11d07b01c0eca
diff --git a/MAINTAINERS b/MAINTAINERS
index 2c1cae0..999301b 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -43,3 +43,5 @@
 -------------------------
 
 M:  Deepak Kodihalli <dkodihal@linux.vnet.ibm.com> <dkodihal!>
+M:  Santosh Puranik <santosh.puranik.ibm@gmail.com> <puranik!>
+M:  Jinu Joy Thomas <jinujoy@linux.vnet.ibm.com> <jthomas7!>