[dev] support of "char" datatype

[Han-Lin Li]

Current iotivity doesn't support char datatype which makes
transmitting binary data difficult.

Will char datatype be support in the future?

diff --git a/resource/include/OCRepresentation.h
b/resource/include/OCRepresentation.h
index ef9d1a9..434286b 100644
--- a/resource/include/OCRepresentation.h
+++ b/resource/include/OCRepresentation.h
@@ -250,6 +251,7 @@ namespace OC
                      std::is_same<T, int>::value ||
                      std::is_same<T, double>::value ||
                      std::is_same<T, bool>::value ||
+                     std::is_same<T, std::vector<char>>::value ||
                      std::is_same<T, std::string>::value ||
                      std::is_same<T, OCRepresentation>::value ||
                      std::is_same<T, std::vector<int>>::value ||

diff --git a/resource/include/AttributeValue.h
b/resource/include/AttributeValue.h
index 327bf13..9f333cd 100644
--- a/resource/include/AttributeValue.h
+++ b/resource/include/AttributeValue.h
@@ -36,6 +36,7 @@
 #include <boost/variant.hpp>
 #include <iosfwd>
 #include <OCUtilities.h>
+
 namespace OC
 {
     class OCRepresentation;
@@ -59,8 +60,11 @@ namespace OC
         std::vector<int>,
         std::vector<double>,
         std::vector<bool>,
+        std::vector<char>,
         std::vector<std::string>,
         std::vector<OC::OCRepresentation>,
+        std::vector<std::vector<char>>,
+        std::vector<std::vector<std::vector<char>>>,

         // Nested sequences:
         std::vector<std::vector<int>>,
@@ -77,6 +81,7 @@ namespace OC

         std::vector<std::vector<OC::OCRepresentation>>,
         std::vector<std::vector<std::vector<OC::OCRepresentation>>>
+
     > AttributeValue;

     enum class AttributeType
@@ -118,6 +123,12 @@ namespace OC
     };

     template<>
+    struct AttributeTypeConvert<char>
+    {
+        constexpr static AttributeType type = AttributeType::Boolean;
+    };
+
+    template<>
     struct AttributeTypeConvert<std::string>
     {
         constexpr static AttributeType type = AttributeType::String;