Merge pull request #17 from chrisryan/master

Update library to work on Php 7

Author: raybot

.gitignore

@@ -1,2 +1,3 @@
 /coverage/
 /vendor/
+clover.xml

README.md

@@ -115,15 +115,15 @@ $compute = function() {
 $result = $memoize->memoizeCallable('myLongOperation', $compute);
 ```
 
-### Null
+### Never
 This memoizer does not actually memoize anything - it always calls the
 `$compute` function.  It is useful for testing and can also be used when you
 disable memoization for debugging, etc. because you can swap your real memoizer
 out for this one and everything will still work.
 
 #### Example
 ```php
-$memoize = new \DominionEnterprises\Memoize\Null();
+$memoize = new \DominionEnterprises\Memoize\Never();
 
 $compute = function() {
     // Perform some long operation that you want to memoize

composer.json

@@ -11,7 +11,7 @@
     ],
     "license": "MIT",
     "require": {
-        "php": "~5.4"
+        "php": "~5.4 || ~7.0"
     },
     "require-dev": {
         "predis/predis": "~1.0",