Added the new mapping:
  std::vector<char> is mapped to BIN.

So, currently BIN, STR, and ARRAY mappings are as follows:
  std::vector<char> is mapped to BIN
  std::string       is mapped to STR
  std::vector<T>    is mapped to ARRAY // T is not char
Merge pull request #100 from redboltz/add_vector_char_as_bin

vector<char> is mapped to BIN