Update changelog for v1.2.0.1

CHANGES.txt

@@ -1,14 +1,24 @@
+Version 1.2.0.1
+2016-08-08
+- Add support for Python 3.3+
+- Use 'mixbox' library for features shared with python-cybox and python-maec.
+- #292 Support organisation_info in STIXCIQIdentity.
+- #276 Fix published_datetime on Vulnerability.
+- #274 Correctly add TTPs to STIXPackage.
+- #269, #271 Make STIXPackage version readonly.
+- #266 Handle custom VocabString values even if they aren't registered.
+
 Version 1.2.0.0
 2015-05-15
 - Support for parsing and creating STIX 1.2 content.
 - Added VocabString implementations for deprecated default STIX controlled
   vocabularies.
 - Refactored internal class resolution for xsi:types.
 - #262 Added support for STIX Report content
-- #261 Added deprecation warnings when setting fields that have been 
+- #261 Added deprecation warnings when setting fields that have been
   deprecated in STIX 1.2.
 - #260 Added Versioning controlled vocabulary.
-- #253 Added support for Kill Chain Phases and Related Pacakges on TTP 
+- #253 Added support for Kill Chain Phases and Related Pacakges on TTP
 
 Version 1.1.1.5
 2015-04-29
@@ -236,4 +246,4 @@ Version 1.0.0a2
 Version 1.0.0a1
 2013-04-22
 - First (alpha) release on PyPI
-- Compatible with STIX 1.0 Draft 2
+- Compatible with STIX 1.0 Draft 2