Add some documentation

README.md

@@ -0,0 +1,27 @@
+# Watch Phpunit
+
+## What is this
+The intention of this application is to 'watch' for file changes, 
+and run the tests related to those files.
+
+In its current implementation it does so very naively. 
+The app can be ran with two options, the source folder to watch, and the test folder.
+If any of the files in these folder change it will attempt to run the tests.
+
+If the file is in the test folder it will simply run phpunit with that test.
+If the file is int he source folder, then it will look for the file as follows:
+
+```diff
++ src/Folder/FileThatChanged.php
+- tests/Folder/FileThatChangedTest.php
+```
+
+
+## Usage
+```
+$ vendor/bin/watch-phpunit watch --src ./src --test ./tests
+```
+(src and tests are the default values, so if your folder structure matches this, you can run it like so:)
+```
+$ vendor/bin/watch-phpunit watch
+```

composer.json

@@ -35,5 +35,6 @@
         "psr-4": {
             "Watcher\\Test\\": "tests/"
         }
-    }
+    },
+    "bin": ["bin/watch-phpunit"]
 }