Update README and travis.yml to acknowledge develop (#235)

* Update README and travis.yml to acknowledge develop

* added code block around develop

Author: jdelapla

.travis.yml

@@ -4,6 +4,7 @@ sudo: true
 branches:
   only:
   - master
+  - develop
 
 cache:
 - directories:

README.md

@@ -99,7 +99,7 @@ Now you can execute the unit tests from the `build` directory as follows:
 
 ## Development
 
-The repository is using master branch as the aggregation and all of the feature development is done in appropriate feature branches. The PRs (Pull Requests) are cut on a feature branch and once approved with all the checks passed they can be merged by a click of a button on the PR tool. The master branch should always be build-able and all the tests should be passing. We are welcoming any contribution to the code base.
+The repository is using `develop` branch as the aggregation and all of the feature development is done in appropriate feature branches. The PRs (Pull Requests) are cut on a feature branch and once approved with all the checks passed they can be merged by a click of a button on the PR tool. The master branch should always be build-able and all the tests should be passing. We are welcoming any contribution to the code base. The master branch contains our most recent release cycle from develop.
 
 ### Release
 The repository is under active development and even with incremental unit test coverage where some of the tests are actually full integration tests, we require more rigorous internal testing in order to 'cut' release versions. The release is cut against a particular commit that gets approved. The general philosophy is to cut a release when a set of commits contribute to a self-containing feature or when we add major internal functionality improvements.