Merge pull request #101 from Parallels/fix-document

fixing document

Author: cjlapao

README.md

@@ -45,13 +45,11 @@ binary file can be found in the root directory.
 To install the compiled plugin, please follow the official Packer documentation
 on [installing a plugin](https://www.packer.io/docs/extending/plugins/#installing-plugins).
 
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 ### Configuration
 
 For more information on how to configure the plugin, please read the
 documentation located in the [`docs/`](docs) directory.
 
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 ## Contributing
 
 * If you think you've found a bug in the code or you have a question regarding