readme: explicitly mention "pip install e-x"

Author: SomberNight

README.md

@@ -24,3 +24,10 @@ Electrum server network runs ElectrumX.
 
 See [readthedocs](https://electrumx-spesmilo.readthedocs.io).
 
+### Releases
+
+ElectrumX is generally mature software and usually running git HEAD in production is fine.
+Alternatively, conservative people can run from the latest tag, for which there are also releases on PyPI:
+```
+$ pip install e-x
+```

docs/release_process.md

@@ -10,7 +10,7 @@
 ### 3. Tag
 
 ```
-$ git tag -s $VERSION -m "$VERSION"
+$ git tag -s "$VERSION" -m "$VERSION"
 $ git push "$REMOTE_ORIGIN" tag "$VERSION"
 ```