Govendor added to documentation
Govendor added to documentation

Signed-off-by: Kestutis Gudynas <kestutis.gudynas@ibm.com>

Option to continue using Govendor after upgrading chaincdoe to v2.x added to the documentation.

manish-sethi/fabric-sidedb,jimthematrix/fabric,manish-sethi/fabric,hyperledger/fabric,hyperledger/fabric,manish-sethi/fabric-sidedb,manish-sethi/fabric-sidedb,manish-sethi/fabric-sidedb,manish-sethi/fabric,jimthematrix/fabric,manish-sethi/fabric-sidedb,manish-sethi/fabric-sidedb,manish-sethi/fabric-sidedb