Introduce support for some common D-Bus annotations (#30)

* Add ability to declare property behavior on PropertyChanged signal

* Add support for Method.NoReply annotation (WIP)

* Add support for common annotations/flags

test/integrationtests/proxy-glue.h

@@ -45,7 +45,6 @@ protected:
                 { this->onSignalWithoutRegistration(s); });
     }
 
-
     virtual void onSimpleSignal() = 0;
     virtual void onSignalWithMap(const std::map<int32_t, std::string>& map) = 0;
     virtual void onSignalWithVariant(const sdbus::Variant& v) = 0;
@@ -78,6 +77,11 @@ public:
         return result;
     }
 
+    void multiplyWithNoReply(const int64_t& a, const double& b)
+    {
+        object_.callMethod("multiplyWithNoReply").onInterface(INTERFACE_NAME).withArguments(a, b).dontExpectReply();
+    }
+
     std::vector<int16_t> getInts16FromStruct(const sdbus::Struct<uint8_t, int16_t, double, std::string, std::vector<int16_t>>& x)
     {
         std::vector<int16_t> result;
@@ -155,6 +159,16 @@ public:
         return result;
     }
 
+    void throwError()
+    {
+        object_.callMethod("throwError").onInterface(INTERFACE_NAME);
+    }
+
+    void throwErrorWithNoReply()
+    {
+        object_.callMethod("throwErrorWithNoReply").onInterface(INTERFACE_NAME).dontExpectReply();
+    }
+
     int32_t callNonexistentMethod()
     {
         int32_t result;