Page History

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1. Implement gathering local node statistics with two levels of detalization: fine-grain by type of page types (about 35 such types) and aggregated statistics: INDEX, DATA, OTHER. Need to support 3 types of IO operations: logical/physical read , and physical read/writewrite (only as global statistics).
2. Implement collecting local node statistics with the following dimensions: cache, index, query.
3. implement exchange IO statistics by nodes to have ability expose cluster statistics (e.g. IO statistics for distributed SQL). 
4. expose IO statistics interfaces for SQL, JMX, Visor, CMD, Web Console

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