Merge branch 'mnt/pre-release' into 'master'

Mnt/pre release

See merge request fsl/fslpy!117

CHANGELOG.rst

@@ -2,8 +2,8 @@ This document contains the ``fslpy`` release history in reverse chronological
 order.
 
 
-2.1.0 (Under development)
--------------------------
+2.1.0 (Friday April 12th 2019)
+------------------------------
 
 
 Added

fsl/version.py

@@ -47,7 +47,7 @@ import            re
 import            string
 
 
-__version__ = '2.1.0.dev0'
+__version__ = '2.2.0.dev0'
 """Current version number, as a string. """