Updated readme to include package versioning information.

Author: MrMatthewLayton

README.md

@@ -2,7 +2,7 @@
 
 # ONIXLabs Corda Core
 
-ONIXLabs Corda Core provides Corda developers with a suite of APIs to empower development of Corda contracts, workflows and integration. These APIs are not intended to be used as CorDapps, since they do not contain any states or contracts, however they are partitioned into contract, workflow and integration modules containing features to improve and simplify CorDapp design and development.
+The ONIXLabs Corda Core API provides Corda developers with a suite of APIs to empower development of Corda contracts, workflows and integration. These APIs are not intended to be used as CorDapps, since they do not contain any states or contracts, however they are partitioned into contract, workflow and integration modules containing features to improve and simplify CorDapp design and development.
 
 ## CorDapp Signing
 
@@ -47,6 +47,16 @@ Follow these steps to integrate the ONIXLabs Corda Core API into your applicatio
     }
     ```
 
+## Package Versioning
+
+The ONIXLabs Corda Core API uses semantic versioning for every published release of the API. Version numbers apply the following format, **_major_._minor_._patch_**; for example 1.2.34
+
+-   **Major** - The API contains breaking changes which are not backwards compatible.
+-   **Minor** - The API contains new features which are backwards compatible.
+-   **Patch** - The API contains bug fixes which are backwards compatible.
+
+Release Candidate versions are considered unstable and likely to change quickly. Release Candidate version numbers apply the following format, **_major_._minor_._patch_-rc#**; for example 1.2.0-rc3
+