Registered functions return String instead of int

[areyalp]

Now registered function methods in the code return String instead of int. For instance, it would allow the responses to be more complex, now it can be returned a response containing String, int casted to String or even a JSON or XML. Therefore, it lets you reply with more than one simple integer.

E.g:

void setup() {
.
.
.
rest.function("test", testFunction);
}

String testFunction(String params) {
String strJson= "{\"key1\" : \"value1\", \"key2\" : \"value2\"}";
return strJson;
}

I did a test with the following result: