Updating to pip installation.

Author: matt-graham

README.md

@@ -1,5 +1,6 @@
 ## PomPy - *p*uff-based *o*dour plume *m*odel in *Py*thon
 
+[![PyPI version](https://badge.fury.io/py/pompy.svg)](https://badge.fury.io/py/pompy)   
 [![Documentation Status](https://readthedocs.org/projects/pompy-docs/badge/?version=latest)](https://pompy-docs.readthedocs.io/en/latest/?badge=latest)
 
 PomPy is a NumPy based implementation of the puff-based odour plume model described in 
@@ -13,24 +14,16 @@ An example simulated concentration field generated by the package is shown below
 
 ![Plume model animation](plume.gif "Plume model animation example.")
 
-### What is this repository for?
-
 PomPy allows simulation of dynamic 2D odour concentration fields which show some of the key characteristics of real chemical plumes in turbulent flows including short term intermittency, diffusive effects and longer term variations in spatial extent and location, while being cheaper to run than a full fluid dynamics simulation.
 
 ### Installation and requirements
 
-PomPy requires a Python 2.7 or newer environment. For usage of the `pompy.models` and `pompy.processors` modules [NumPy](http://www.numpy.org/) and [SciPy](https://scipy.org/scipylib/index.html) are required. For the demonstrations in the `pompy.demos` module [Matplotlib](https://matplotlib.org/) is also required. The [`requirements.txt`](requirements.txt) file lists versions of NumPy, SciPy and Matplotlib known to work with PomPy. A [Jupyter](https://matplotlib.org/) notebook server installation will also be required to run the example notebooks locally. 
-
-To install PomPy in the current Python environment run
-
-```
-python setup.py install
-```
+PomPy requires a Python 2.7 or newer environment. For usage of the `pompy.models` and `pompy.processors` modules [NumPy](http://www.numpy.org/) and [SciPy](https://scipy.org/scipylib/index.html) are required. For the demonstrations in the `pompy.demos` module [Matplotlib](https://matplotlib.org/) is also required. The [`requirements.txt`](requirements.txt) file lists versions of NumPy, SciPy and Matplotlib known to work with PomPy. A [Jupyter](https://matplotlib.org/) notebook server installation will also be required to run the example notebooks locally.
 
-and to install the Python requirements using pip run
+To install the package run
 
 ```
-pip install -r requirements.txt
+pip install pompy
 ```
 
 ### Documentation