Add info about 2.2.1 release to the doap file.
<created>2017-09-04</created>
<revision>v2.2.0</revision>
</Version>
+ </release>
+ <release>
+ <Version>
+ <name>2.2.1</name>
+ <created>2017-09-21</created>
+ <revision>v2.2.1</revision>
+ </Version>
</release>
<repository>
<SVNRepository>
