Tag support for expiration

[se]

Expiration tags support would be great for expire cache item / group with common tag or tags.

For example.

Yakari.Cache.Expire("City");

or

Yakari.Cache.Expire("Country", "City", "State", "Street");

A cache item or group can be include more than one tag.

[efaruk]

We will going to add region/group support for both memory management and object sharing. Also we already have

ILocalCacheProvider.Delete("City") //Also it will be distributed to all instances...

When we implement region/group we will support region/group cache invalidation.

But i have to say, tagging instead of grouping could be more interesting. Let me think about it for a while and I'm going to close this issue and add a new one #12