Use boost::atmoic instead of std::atmoic in standard edition, because vc has not add c++11's new library atmoic yet.

Compatible editon has already used boost::atmoic.

Use dynamic_cast to replace dynamic_pointer_cast;
Now, the demo file_client from compatible edition need at least boost 1.53, please notice.

Add a new function run_service to st_service_pump, which works like io_service::run, so, it will block until service run out, and do not call stop_service any more.
Add a virtual callback function on_exception to st_service_pump, it will be invoked when exception caught, you can rewrite it do decide weather to continue(return true) or stop the service(return false).

Demos remain unchanged.

No any material code changes.

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