See if the main loop in asyncnet can be changed to be fully asynchronous

[meirtsvi]

Currently, the main loop in asyncnet file contains actions on http request and response. WP7 platforms forces us to use the async version of each class (BeginGetResponse instead of GetResponse) but in order to keep the loop intact I use Manual Reset Event.
We need to check if the implementation of the main loop can be change so that the loop will still continue to function well while the calls to http classes will not be synchronized with events or any other blocking constucts. This will increase the overall performance of the system.