Asynchronous version of Session.Get & Session.Set about session

[kichalla]

@hishamco : We did discuss about this in our team and felt that exposing async apis for Get and Set would not give a good user experience. More details below:

1. Session.Get("key1") -> if the session is not loaded already, then its loaded and would be a synchronous call
2. Session.Get("key2") -> This call would not be over the network as all the session data has already been loaded into memory and would just be an in-memory lookup for this key.

To avoid making the the blocking call in step 1. above, you could do something like:

1. await Session.LoadAsync(); -> async call after which all the data related to current session is loaded into memory.
2. Session.Get("key1") -> in-memory lookup
3. Session.Get("key2") -> in-memory lookup

[hishamco]

Thanks for clarification @kichalla, also I have seen a related issue #31 if i'm not wrong