Add README documentation for pep8; limit lines to 80 chars

README.md

@@ -3,13 +3,18 @@
 *Copyright 2015 Caleb Evans*  
 *Released under the MIT license*
 
-YouVersion Suggest is an Alfred workflow which allows you to search the online [YouVersion](https://www.youversion.com/) bible quickly and conveniently.
+YouVersion Suggest is an Alfred workflow which allows you to search the online
+[YouVersion](https://www.youversion.com/) bible quickly and conveniently.
 
 ![YouVersion Suggest in action](screenshots/chapters.png)
 
 ## Usage
 
-Type the `yv` keyword, along with a space and a phrase representing the bible reference you wish to find. The phrase can be partial book name, chapter, verse, or range of verses. You may also include an option version (translation) at the end of your query. As you type, YouVersion Suggest will display a list of suggestions matching your query.
+Type the `yv` keyword, along with a space and a phrase representing the bible
+reference you wish to find. The phrase can be partial book name, chapter, verse,
+or range of verses. You may also include an option version (translation) at the
+end of your query. As you type, YouVersion Suggest will display a list of
+suggestions matching your query.
 
 ### Query Examples
 
@@ -21,18 +26,26 @@ Type the `yv` keyword, along with a space and a phrase representing the bible re
 
 ## Testing
 
-If you are contributing to the project and would like to run the included unit tests, run the following command in the project directory:
+If you are contributing to the project and would like to run the included unit
+tests, run the following command in the project directory:
 
 ```
 python -m unittest tests
 ```
 
-Note that running these unit tests requires Python 2.7 or newer (Python 3 is not supported).
-
 ### Running an individual test case
 
 If you wish to run a single test case, reference the module name like so:
 
 ```
 python -m unittest tests.test_search_book
 ```
+
+### Requirements for running tests
+
+Note that running these unit tests requires Python 2.7. Running these tests also
+requires the `pep8` module, which you can install using `pip`:
+
+```
+pip install pep8
+```