Merge pull request circleci#1547 from circleci/sample-config-clarification

update sample-config.md with clarification

Author: michelle-luna

jekyll/_cci2/sample-config.md

@@ -10,7 +10,7 @@ order: 2
 * TOC
 {:toc}
 
-The CircleCI 2.0 configuration introduces a new key for `version: 2`. This new key enables you to try 2.0 while continuing to build on 1.0. New keys for `jobs:` and `steps:` enable greater control and provide a framework for workflows and status on each phase of a run to report more frequent feedback.
+The CircleCI 2.0 configuration introduces a new key for `version: 2`. This new key enables you to try 2.0 while continuing to build on 1.0. That is, you can still use 1.0 on some projects while using 2.0 on others. New keys for `jobs:` and `steps:` enable greater control and provide a framework for workflows and status on each phase of a run to report more frequent feedback.
 
 The following sections provide a sample `.circleci/config.yml` with an overview of Jobs and Steps, changes to keys from 1.0, new keys that are nested inside Steps and new keys for Workflows.