Changed degree character to html representation, closes #15. Thanks @CheckeredMichael!

Author: Michael Brooks

Cmfcmf/OpenWeatherMap/Forecast.php

@@ -50,7 +50,7 @@ public function __construct($xml, $units)
         $this->city = new City($xml->city['id'], $xml->city['name'], $xml->city->coord['lon'], $xml->city->coord['lat'], $xml->city->country);
 
         if ($units == 'metric') {
-            $temperatureUnit = "\xB0C";
+            $temperatureUnit = "°C";
         } else {
             $temperatureUnit = 'F';
         }

Cmfcmf/OpenWeatherMap/Util/Unit.php

@@ -83,7 +83,7 @@ public function getUnit()
     {
         // Units are inconsistent. Only celsius and fahrenheit are not abbreviated. This check fixes that.
         if ($this->unit == 'celsius') {
-            return "\xB0C";
+            return "°C";
         } else if ($this->unit == 'fahrenheit') {
             return 'F';
         } else {

Cmfcmf/OpenWeatherMap/Util/UnitTest.php

@@ -98,7 +98,7 @@ public function testCelsiusFixture()
     {
         $this->givenThereIsAUnitWithUnit("celsius");
 
-        $this->assertSame("\xB0C", $this->unit->getUnit());
+        $this->assertSame("°C", $this->unit->getUnit());
     }
 
     public function testFahrenheitFixture()