librtmp without OpenSSL

在C++ PreprocessorDefinitions 中添加NO_CRYPTO;
不编译OpenSSL, 不加密
这样的话 就不再需要拷贝libeay32.dll和ssleay32.dll

Build the librtmp

You can use librtmp.lib but libeay32.dll and libssl32.dll need to be copied to the bin directory.