move service_identity install to venv

docs/INSTALL.md

@@ -20,7 +20,7 @@ automake pkg-config libtool libffi-dev libssl-dev
 
 Then:
 
-    sudo pip install virtualenv service-identity
+    sudo pip install virtualenv
     mkdir jmvenv
     virtualenv jmvenv
     cd jmvenv; source bin/activate; cd ..

jmbase/setup.py

@@ -9,5 +9,5 @@ setup(name='joinmarketbase',
       author_email='ekaggata@gmail.com',
       license='GPL',
       packages=['jmbase'],
-      install_requires=['twisted==16.6.0',],
+      install_requires=['twisted==16.6.0', 'service-identity'],
       zip_safe=False)