Added pop() method to query_string, same as get(), but removes the item from the querystring
Added std::string() operator to json::rvalue (allows std::string(json["abc"]), which returns any value that isn't a container to string)
Added lo() method to json::rvalue, returns a vector of json::rvalue containing whatever a json object or list has (difference being a list has no keys)
Added keys() method to json::rvalue, returns a vector of std::string containing the keys of a json object
Made json::wvalue use either std::map or std::unordered_map instead of just std::unordered_map
Added copy constructor to json::wvalue
Added size() method to json::wvalue, returns 1 or the size of the json list.
Added constructor to create json::wvalue from std::vector
Added keys() method to query_string
Documented query_string and improved json doc
Made tests and examples for all the additions
Added mkdocs documentation.
Altered doxygen generation (doxyfile and shell script) to work with mkdocs.
Removed the whole html folder thing for docs, now the files reside in the root gh-pages branch.
New readme.