Insert string keys in map without quotes.

Stripping the first and the last instance of the character '"' when
adding a key to the map, in order to facilitate the future searches.

JSON.cpp

@@ -57,7 +57,7 @@ std::string Members::toJSON(int spc, bool skip_initial) const {
   typedef std::map<std::string, Value*>::const_iterator map_iterator;
   for (map_iterator it = pairs_.begin();
        it != pairs_.end(); it++) {
-    str += spcs + it->first + " : " + it->second->toJSON(spc, true);
+    str += spcs + "\"" + it->first + "\"" + " : " + it->second->toJSON(spc, true);
     if (i < sz - 1) {
       str += ",\n";
       i++;

JSONParser.cpp

@@ -110,7 +110,11 @@ std::pair<string, Value*> Parser::jPair() {
   }
   Value *val = jValue();
 
-  std::pair<std::string, Value*> ret(str->toJSON(0, false), val);
+  std::string key = str->toJSON(0, false);
+  // Strip the first and last double quote from the key
+  // for easier searching in the map.
+  key = key.substr(key.find_first_of("\"") + 1, key.find_last_of("\"") - 1);
+  std::pair<std::string, Value*> ret(key, val);
   delete str;
   return ret;
 }