add readme and license

LICENSE

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+Copyright (c) 2013 Codevise Solutions Ltd.
+
+MIT License
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

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+# Jenkins nvm Plugin
+
+[github.com/codevise/jenkins-nvm-plugin](https://github.com/codevise/jenkins-nvm-plugin/)
+
+A Jenkins Plugin to run builds in an [nvm](https://github.com/creationix/nvm) managed environment.
+
+## Features
+
+- Installs `nvm.sh`
+- Installs node version configured for job.
+- Amends build environment to use configured node version.
+
+## Acknowledgements
+
+Heavily inspired by the [Jenkins rvm plugin](https://github.com/jenkinsci/rvm-plugin).
+
+### License
+
+Please fork and improve.
+
+Copyright (c) 2013 Codevise Solutions Ltd. This software is licensed under the MIT License.