Merge pull request #6 from misa-neopix/patch-1

Handle negated words with uppercase letters

src/Analyzer.php

@@ -32,6 +32,7 @@ public function __construct($lexicon_file = "Lexicons/vader_sentiment_lexicon.tx
     */
     public function IsNegated($wordToTest, $include_nt = true)
     {
+        $wordToTest = strtolower($wordToTest);
         if (in_array($wordToTest, Config::NEGATE)) {
             return true;
         }