Messages local cache

[luckyycode]

I think it would be nice to have a local messages/users cache so no excess count of telegram api calls will be made
Somehow related to #2 I think, so one could choose which cache provider they would like to use

[Aquathing]

A cache of peers is already available and calls to GetUsers/GetFullUser GetChannels/GetFullChannel and GetChats/GetFullChat do not cause network requests if not in rare cases (cache expired/CatraProto was updated and the layer version changed).

The suggestion about local messages cache is very welcome though.