Added linux installation guide to README.md

* [numpy](https://store.continuum.io/cshop/anaconda/)

* [keras](keras.io)

* [vs_utils] (https://github.com/pandegroup/vs-utils.git)

#Linux Installation

Deep_chem currently requires Python 2.7

##Anaconda 2.7

Download the **Python 2.7** version of Anaconda for linux (32 or 64 bit depending on system) here(www.continuum.io/downloads#_unix).

Follow the installation instructions(http://docs.continuum.io/anaconda/install#linux-install)

##Openbabel

```bash

conda install -c https://conda.anaconda.org/omnia openbabel

```  

Follow the onscreen installation instructions

##Rdkit

```bash

conda install -c https://conda.anaconda.org/omnia rdkit

```

Follow the onscreen installation instructions

##Keras

Clone the keras git repository

```bash

git clone https://github.com/fchollet/keras.git

```

Cd into the keras directory and execute

```bash

python setup.py install

```

##vs_utils

Clone the vs_utils git repository

```bash

git clone https://github.com/pandegroup/vs-utils.git

```

Cd into the vs-utils directory and execute

```bash

python setup.py develop

```

##deep_chem

Clone the deep_chem git repository

```bash

git clone https://github.com/pandegroup/deep-learning.git

```

Cd into the deep-learning directory and execute 

```bash

python setup.py develop

```