DOC: Update requirements

Update requirements
Add requirements to docs

closes #34

Author: bashtage

README.rst

@@ -31,31 +31,6 @@ Up to date remote data access for pandas, works for multiple versions of pandas.
   although there are frequent reports of failures.  Failure is frequently
   encountered when bulk downloading historical price data.
 
-Installation
-------------
-
-
-Install latest release version via pip
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-.. code-block:: shell
-
-   $ pip install pandas-datareader
-
-Install latest development version
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-.. code-block:: shell
-
-    $ pip install git+https://github.com/pydata/pandas-datareader.git
-
-or
-
-.. code-block:: shell
-
-    $ git clone https://github.com/pydata/pandas-datareader.git
-    $ python setup.py install
-
 Usage
 -----
 
@@ -84,4 +59,49 @@ A second copy of the stable documentation is hosted on
 `read the docs <https://pandas-datareader.readthedocs.io/>`_ for more details.
 
 `Development documentation <https://pydata.github.io/pandas-datareader/devel/>`__
-is available for the latest changes in master.
+is available for the latest changes in master.
+
+Installation
+------------
+
+Requirements
+~~~~~~~~~~~~
+
+Using pandas datareader requires the following packages:
+
+* pandas>=0.19.2
+* lxml
+* requests>=2.3.0
+* requests-file
+* requests-ftp
+* wrapt
+
+Building the documentation additionally requires:
+
+* matplotlib
+* ipython
+* sphinx
+* sphinx_rtd_theme
+
+Testing requires pytest.
+
+Install latest release version via pip
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. code-block:: shell
+
+   $ pip install pandas-datareader
+
+Install latest development version
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. code-block:: shell
+
+    $ pip install git+https://github.com/pydata/pandas-datareader.git
+
+or
+
+.. code-block:: shell
+
+    $ git clone https://github.com/pydata/pandas-datareader.git
+    $ python setup.py install

requirements.txt

@@ -1,8 +1,12 @@
 lxml
-numpy
-pandas
-pytest
-requests
-requests_file
-requests_ftp
+pandas>=0.19.2
+pytest>=3
+requests>=2.3.0
+requests-file
+requests-ftp
 wrapt
+# Documentation Only
+matplotlib
+ipython
+sphinx
+sphinx_rtd_theme

setup.py

@@ -14,7 +14,7 @@ def readme():
 
 
 INSTALL_REQUIRES = (
-    ['pandas>=0.17.0', 'requests>=2.3.0', 'requests-file', 'requests-ftp']
+    ['pandas>=0.19.2', 'requests>=2.3.0', 'requests-file', 'requests-ftp', 'wrapt', 'lxml']
 )
 
 setup(