Add OutputMemoryStream and port most classes to use it

include/tins/exceptions.h

@@ -49,7 +49,7 @@ public:
 /**
  * \brief Exception thrown when an option is not found.
  */
-class option_not_found : exception_base {
+class option_not_found : public exception_base {
 public:
     // try to avoid allocations by doing this.
     const char* what() const throw() {
@@ -67,6 +67,16 @@ public:
     }
 };
 
+/**
+ * \brief Exception thrown when serializing a packet fails.
+ */
+class serialization_error : public exception_base {
+public:
+    const char* what() const throw() {
+        return "Serialization error";
+    }
+};
+
 /**
  * \brief Exception thrown when a PDU is not found when using PDU::rfind_pdu.
  */