Update release notes for previous commits

RELEASE_NOTES.md

@@ -2,6 +2,8 @@
 
 ### TBD
 
+* Fixed issue with optional parameters being marked as invalid *(Issue #34)*
+* Fixed issue with `Parameter#getValue` not supporting non-plain object *(We need this for when passing in an `http.ClientRequest`) *(Issue #35)*
 * Updated json-refs to fix a bug with remote reference errors *(Issue #36)*
 
 ### v0.3.2 (2015-10-14)