Added setCountry function to main API.

This allows the country to be changed without reloading the library and runtime_data

src/openalpr/alpr.cpp

@@ -87,6 +87,10 @@ namespace alpr
     return AlprImpl::fromJson(json);
   }
 
+  void Alpr::setCountry(std::string country) {
+    impl->setCountry(country);
+  }
+
 
   void Alpr::setDetectRegion(bool detectRegion)
   {