Updated README.md

Author: sea5kg

README.md

@@ -4,3 +4,29 @@
 
 Helper classes for create C++ Data Transfer Object 
 
+## Integrate to your project
+
+Include this files:
+
+* src.wsjcpp/nlohmann_json/json.hpp
+* src/wsjcpp_dto.h
+* src/wsjcpp_dto.cpp
+
+Or use a `wsjcpp`:
+
+```
+$ wsjcpp install https://github.com/wsjcpp/wsjcpp-dto:master
+```
+
+## How to use:
+
+```
+class WsjcppDtoPerson : public WsjcppDefineDto {
+    public:
+        WsjcppDtoPerson() : WsjcppDefineDto("person", "Person") {
+            // requireField<WsjcppDtoString>("name", "Name of person");
+            requireField<WsjcppDtoString>("name", "Name of person");
+            optionalField<WsjcppDtoInteger>("age", "Age of person");
+        };
+};
+```