Cleanup in src/, adding namespaces, removing php closing tag and general code cleanup

src/Numerics/Range.php

@@ -1,10 +1,10 @@
-<?php
-
-namespace Moserware\Numerics;
+<?php namespace Moserware\Skills\Numerics;
 
 // The whole purpose of this class is to make the code for the SkillCalculator(s)
 // look a little cleaner
 
+use Exception;
+
 class Range
 {
     private $_min;
@@ -57,6 +57,4 @@ class Range
     {
         return ($this->_min <= $value) && ($value <= $this->_max);
     }
-}
-
-?>
+}