Update README.md

README.md

 # Online Neural Network (ONN)
+
+## Installing
+```
+pip install onn
+```
+## Contributors
+- [Alison de Andrade Carrera](https://github.com/alison-carrera)
+- [Fábio Silva Vilas Boas](https://github.com/fabiosvb)
+
+## References
+- [Online Deep Learning: Learning Deep Neural Networks on the Fly](https://arxiv.org/abs/1711.03705)