Update README

Remove Travis, update git flow instructions

README.md

@@ -1,6 +1,5 @@
 # docker-taudem
 
-[![Travis CI](https://api.travis-ci.org/WikiWatershed/docker-taudem.svg "Build Status on Travis CI")](https://travis-ci.org/WikiWatershed/docker-taudem/)
 [![Docker Repository on Quay.io](https://quay.io/repository/wikiwatershed/taudem/status "Docker Repository on Quay.io")](https://quay.io/repository/wikiwatershed/taudem)
 [![Apache V2 License](http://img.shields.io/badge/license-Apache%20V2-blue.svg)](https://github.com/wikiwatershed/docker-taudem/blob/develop/LICENSE)
 
@@ -23,7 +22,5 @@ $ git flow release start 0.1.0
 $ vim CHANGELOG.md
 $ vim Dockerfile
 $ git commit -m "0.1.0"
-$ git flow release publish 0.1.0
-$ git flow release finish 0.1.0
-$ git push --tags
+$ git flow release finish -p 0.1.0
 ```