v2.2.7

* Check the comparibility of obspyDMT with obspy 1.2.1, and python 3.6.

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v2.2.6

* Add a new process unit: ./obspyDMT/process_unit_rename.py

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v2.2.5

Major
* Support iris-federator and eida-routing web services 

Bugs/Issues

Minor
* update README file
