Arrays now converted to string and passed as parameter

Arrays now properly converted to string such as "['1', '2']" and passed to request as parameter.
Fixes daltoniam#293.

Source/Request.swift

@@ -132,7 +132,7 @@ extension Dictionary: HTTPParameterProtocol {
 Support for the Array type as an HTTPParameter.
 */
 extension Array: HTTPParameterProtocol {
-
+    /*
     public func createPairs(_ key: String?) -> [HTTPPair] {
         var collect = [HTTPPair]()
         for v in self {
@@ -148,6 +148,19 @@ extension Array: HTTPParameterProtocol {
         }
         return collect
     }
+    */
+
+    public func createPairs(_ key: String?) -> [HTTPPair] {
+        let pair: HTTPPair = HTTPPair(key: (key != nil ? "\(key!)" : key), value: self.stringRepresentation)
+        return [pair]
+    }
+
+    var stringRepresentation: String {
+        var str = "["
+        self.forEach { str += "\($0)," }
+        str = String(str.dropLast()) // drops last comma
+        return str + "]"
+    }
 }
 
 /**