Register v as a class alias to Validator

This is a pattern that we already use everywhere, so it makes sense to
simply turn `v` into a class alias to `Validator`, which will allow
people to use all the examples in the documentation without needing to
import the namespace.

We already do that when we run tests, so I just changed it to be a
global setting.

Author: henriquemoody

tests/aliases.php aliases.phptests/aliases.php renamed to aliases.php

@@ -59,14 +59,14 @@
     "autoload": {
         "psr-4": {
             "Respect\\Validation\\": "library/"
-        }
+        },
+        "files": ["aliases.php"]
     },
     "autoload-dev": {
         "psr-4": {
             "Respect\\Validation\\": "tests/unit/",
             "Respect\\Validation\\Test\\": "tests/library/"
-        },
-        "files": ["tests/aliases.php"]
+        }
     },
     "scripts": {
         "docheader": "vendor/bin/docheader check library/ tests/",

composer.json

@@ -1,10 +1,9 @@
 # Feature Guide
 
-We'll use `v` as an alias for `Respect\Validation\Validator` to keep things simple:
+The `Validator` class is the core of Respect\Validation, offering a fluent interface for building validation rules.
+
+For convenience, the `Validator` class is aliased as `v`. This means you can write `v::intType()` instead of `\Respect\Validation\Validator::intType()`.
 
-```php
-use Respect\Validation\Validator as v;
-```
 
 ## Validating using booleans