Fix issue #22 - Allow install with Python 2.7

Readme.md

@@ -32,6 +32,13 @@ Pypub is currently only compatible with Python 2.
 
 Documentation is available at [http://pypub.readthedocs.org/en/latest/developer_interface.html](http://pypub.readthedocs.org/en/latest/developer_interface.html)
 
+# Dev Setup #
+
+To use code from a source code checkout from git
+
+    $ python -m pip install -r requirements.txt
+
+
 # Copyright and License #
 
 Copyright (c) 2020 William Cember

requirements-dev.txt

@@ -0,0 +1,2 @@
+sphinxcontrib-napoleon
+-r requirements.txt

requirements.txt

@@ -1,4 +1,4 @@
-sphinxcontrib-napoleon
-beautifulsoup4
-requests
-jinja2
+MarkupSafe==1.1.1
+beautifulsoup4==4.9.3
+requests==2.22.0
+jinja2==2.11.3

setup.py

@@ -10,9 +10,10 @@
     url = 'https://github.com/wcember/pypub',
     license='MIT',
     install_requires=[
-            'beautifulsoup4',
-            'jinja2',
-            'requests',
+            'MarkupSafe==1.1.1',
+            'beautifulsoup4==4.9.3',
+            'jinja2==2.11.3',
+            'requests==2.22.0',
             ],
     description= "Create epub's using python. Pypub is a python library to create epub files quickly without having to worry about the intricacies of the epub specification.",
 )