64-bit python versions note added (#22)

README.md

@@ -20,7 +20,8 @@ It is just needed to execute the next command in the root directory of the proje
 ```bash
 python3 setup.py install
 ```
-
+> Note: By now, only 64-bit Python versions are supported. 
+
 ## Executing the tests:
 The tests can be executed and they are located in <project-root-dir>/tests/unit_tests.
 
@@ -35,5 +36,4 @@ make html
 ## Contributing
 The rules to contribute to this project are described [here](CONTRIBUTING.md)
 
-
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+[![Powered by Shapelets](https://img.shields.io/badge/powered%20by-Shapelets-orange.svg?style=flat&colorA=E1523D&colorB=007D8A)](https://shapelets.io)