Merge pull request #92 from jeffhandley/summary

Fixes #12 with a new PR, updated to reflect pre-release and build metadata.

semver.md

@@ -1,6 +1,21 @@
 Semantic Versioning 2.0.0-rc.2
 ==============================
 
+Summary
+-------
+
+Given a version number MAJOR.MINOR.PATCH, increment the:
+
+1. MAJOR version when you make incompatible API changes,
+1. MINOR version when you add functionality in a backwards-compatible
+   manner, and
+1. PATCH version when you make backwards-compatible bug fixes.
+
+Additional labels for pre-release and build metadata are available as extensions to the MAJOR.MINOR.PATCH format.
+
+Introduction
+------------
+
 In the world of software management there exists a dread place called
 "dependency hell." The bigger your system grows and the more packages you
 integrate into your software, the more likely you are to find yourself, one