List Django as a dependency. Fix #96

also add a big warning statement about possible side effects and
to deter people from reporting issues about Django version
mismatches. Updates README formatting a bit as well.

Author: atodorov

README.md

@@ -10,19 +10,33 @@ pylint-django
 
 `pylint-django` is a [Pylint](http://pylint.org) plugin for improving code analysis for when analysing code using Django. It is also used by the [Prospector](https://github.com/landscapeio/prospector) tool.
 
-## Usage
+# Installation
 
-#### Pylint
+```
+pip install pylint-django
+```
+
+**WARNING:** `pylint-django` requires `Django` to be installed. Our `setup.py` file doesn't
+specify which particular version of Django is going to be installed because we have no idea
+what version is used inside your project. The latest version of Django will be installed if
+it has not been installed beforehand! DO NOT report issues about mismatching Django versions
+if that happens. Instead get your testing environment sorted out and make sure that you have
+the appropriate version of Django installed!
+
+# Usage
+
+## Pylint
 
-Ensure `pylint-django` is installed and on your path (`pip install pylint-django`), and then run pylint:
+Ensure `pylint-django` is installed and on your path and then execute:
 
 ```
 pylint --load-plugins pylint_django [..other options..]
 ```
 
-#### Prospector
+## Prospector
 
-If you have `prospector` installed, then `pylint-django` will already be installed as a dependency, and will be activated automatically if Django is detected.
+If you have `prospector` installed, then `pylint-django` will already be installed as a dependency,
+and will be activated automatically if Django is detected.
 
 ```
 prospector [..other options..]
@@ -42,14 +56,14 @@ Please feel free to add your name to the `CONTRIBUTORS.md` file if you want to b
 credited when pull requests get merged. You can also add to the `CHANGELOG.md` file
 if you wish, although I'll also do that when merging if not.
 
-## Tests
+# Tests
 
 The structure of the test package follows that from pylint itself.
 
 It is fairly simple: create a module starting with `func_` followed by
 a test name, and insert into it some code. The tests will run pylint
- against these modules. If the idea is that no messages now occur, then
- that is fine, just check to see if it works by running `scripts/test.sh`.
+against these modules. If the idea is that no messages now occur, then
+that is fine, just check to see if it works by running `scripts/test.sh`.
 
 Ideally, add some pylint error suppression messages to the file to prevent
 spurious warnings, since these are all tiny little modules not designed to
@@ -64,4 +78,4 @@ These are useful to quickly add "expected messages".
 
 # License
 
-`pylint-django` is available under the GPLv2 license.
+`pylint-django` is available under the GPLv2 license.

setup.py

@@ -17,6 +17,7 @@
     install_requires=[
         'pylint-plugin-utils>=0.2.1',
         'pylint>=1.8.2',
+        'Django',
     ],
     license='GPLv2',
     classifiers=[