Capped Collection Feature

[pmaselkowski]

Add @Capped annotation to support capped collection.

This should by default make capped colection, when used without params, ie:

@Capped

Or take up to two anonymous parameters:

// @Capped(int:max, int:size)
@Capped(500, 200000)

Or named parameters:

@Capped(max = 100, size = 200000)

NOTE: According to docs to create capped collection, it must be created explicitly.

db.createCollection("log", { capped : true, size : 5242880, max : 5000 } )

This info should be stored in runtime in php file, similarly as in #59.
File must be unique for each db

Perhaps some meta file with __set_state should be used.

For consistence annotation should use field capped of type CappedMeta

[pmaselkowski]

This is connected a bit to #59 as it requires storing some extra data in runtime.