Add Versioning section to README file

README.md

@@ -47,11 +47,20 @@ resumeSchema.validate(resumeObject);
 
 We encourage anyone who's interested in participating in the formation of this standard, to join us on IRC, and/or to join the discussions [here on GitHub](https://github.com/jsonresume/resume-schema/issues). Also feel free to fork this project and submit new ideas that you feel are a needed addition to the jsonresume standard. To make sure all formatting is kept in check, please install the [EditorConfig plugin](http://editorconfig.org/) for your editor of choice.
 
-### Research
+### Versioning
 
-- [A more professional recruitment process with structured data](/research/A%20more%20professional%20recruitment%20process%20with%20structured%20CV%20data.pdf).
+JSON Resume Schema adheres to Semantic Versioning 2.0.0. If there is a violation of
+this scheme, report it as a bug. Specifically, if a patch or minor version is
+released and breaks backward compatibility, that version should be immediately
+yanked and/or a new version should be immediately released that restores
+compatibility. Any change that breaks the public API will only be introduced at
+a major-version release. As a result of this policy, you can (and should)
+specify any dependency on JSON Resume Schema by using the Pessimistic Version
+Constraint with two digits of precision.
 
+### Research
 
+- [A more professional recruitment process with structured data](/research/A%20more%20professional%20recruitment%20process%20with%20structured%20CV%20data.pdf).
 
 ### Proposals to reinvestigate