Fix compilation error after disabling RTTI support

[cngzhnp]

I tried to fix that issue by adding BOOST_NO_RTTI preprocessor definition and type_index solution of Boost itself which I created PR #164.

In my opinion, dynamic_cast_tag struct must be supported if only RTTI is not disabled via this flag. Because of that reason, I just wrapped up with BOOST_NO_RTTI preprocessor where it is used. If you disagree with that, you can offer another solution for that.

I do not edit any documentation or test code without confirmation, please review this and let me know which parts need to be changed on documentation and test codes.

Thanks in advance.