Update CHANGELOG.md, AUTHORS.md, documentation

Author: robertodr

AUTHORS.md

@@ -11,4 +11,4 @@
 - Ville Weijo (@vweijo)
 - Ward Poelmans (@wpoely86)
 
-This list was obtained 2018-04-27 by running `git shortlog -sn`
+This list was obtained 2018-05-01 by running `git shortlog -sn`

CHANGELOG.md

@@ -2,6 +2,14 @@
 
 ## [Unreleased]
 
+## [Version 1.2.1] - 2018-05-01
+
+### Fixed
+
+- Import of local copy of the `pyparsing` module in Getkw. Thanks @loriab for
+  the fix.
+- The `conf.py` documentation build script is restored to normal operation.
+
 ## [Version 1.2.0] - 2018-04-27
 
 ### Added
@@ -559,7 +567,8 @@
 
 ## v1.0.0 - 2014-09-30 [YANKED]
 
-[Unreleased]: https://github.com/PCMSolver/pcmsolver/compare/v1.2.0...HEAD
+[Unreleased]: https://github.com/PCMSolver/pcmsolver/compare/v1.2.1...HEAD
+[Version 1.2.0]: https://github.com/PCMSolver/pcmsolver/compare/v1.2.0...v1.2.1
 [Version 1.2.0]: https://github.com/PCMSolver/pcmsolver/compare/v1.2.0-rc1...v1.2.0
 [Version 1.2.0-rc1]: https://github.com/PCMSolver/pcmsolver/compare/v1.1.12...v1.2.0-rc1
 [Version 1.1.12]: https://github.com/PCMSolver/pcmsolver/compare/v1.1.11...v1.1.12

doc/programmers/versioning.rst

@@ -71,6 +71,7 @@ This is the step-by-step guide to releasing a new version of PCMSolver:
        This list was obtained 2018-03-02 by running `git shortlog -sn`
 
 #. **CHECK** that the ``.mailmap`` file is up-to-date.
+#. **CHECK** that the documentation builds locally.
 #. **ACT** to check all the changed files in.
 #. **OBSERVE** current versioning state