Add in current installation instructions

documentation/install.txt

+sudo apt-get update
+sudo apt-get upgrade gcc
+sudo xargs -a apt-packages.txt apt-get install
+sudo pip install virtualenv
+sudo mkdir /opt/edx
+source /opt/edx/bin/activate
+cd /opt/wwc/machine-learning
+pip install numpy
+pip install scipy
+pip install -r requirements.txt
+cd opt/wwc/machine-learning
+pup install -r requirements.txt
+python -m nltk.downloader maxent_treebank_pos_tagger wordnet
+sudo mv /path/to/nltk_data /usr/share
\ No newline at end of file

install/apt-packages.txt

+python-pip
+python-scipy
+python-mysqldb
+ipython
+nginx
+git
+redis-server
+libmysqlclient-dev
+gfortran
+libblas3gf
+libblas-dev
+liblapack3gf
+liblapack-dev
+libatlas-base-dev
+libxml2-dev
+libxslt1-dev
+libreadline6
+libreadline6-dev
+build-essential
+curl
 aspell
+python
\ No newline at end of file