Add Uri::buildUrl() method

Builds url with given root url and parts of url

docs/Static-methods.md

@@ -22,6 +22,7 @@ var_dump($firstElement); // string(5) "lorem"
 5. [**Static methods**](Static-methods.md)
    1. [Arrays](Static-methods/Arrays.md)
    2. [Regex](Static-methods/Regex.md)
+   3. [Uri](Static-methods/Uri.md)
 6. [Value Objects](Value-Objects.md)
 
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