Updating changelog for 1.1.1 release

Author: mattfarina

CHANGELOG.md

@@ -1,9 +1,13 @@
-# Release 1.x.x (xxxx-xx-xx)
+# Release 1.1.1 (2016-06-30)
 
+## Changed
 - Issue #9: Speed up version comparison performance (thanks @sdboyer)
 - Issue #8: Added benchmarks (thanks @sdboyer)
+- Updated Go Report Card URL to new location
+- Updated Readme to add code snippet formatting (thanks @mh-cbon)
+- Updating tagging to v[SemVer] structure for compatibility with other tools.
 
-# Release 1.1.0 (2015-03-11)
+# Release 1.1.0 (2016-03-11)
 
 - Issue #2: Implemented validation to provide reasons a versions failed a
   constraint.