Update README

Author: martinRenou

README.md

@@ -1 +1,30 @@
 # Matplotlib Inline Back-end for IPython and Jupyter
+
+## Installation:
+
+With pip:
+
+```bash
+pip install matplotlib-inline
+```
+
+With conda:
+
+```bash
+conda install -c conda-forge matplotlib-inline
+```
+
+## Usage
+
+In a Jupyter Notebook:
+
+```python
+%matplotlib inline
+
+import matplotlib.pyplot as plt
+import numpy as np
+
+x = np.linspace(0, 3*np.pi, 500)
+plt.plot(x, np.sin(x**2))
+plt.title('A simple chirp');
+```