Added reads_io_account_ field to current_page_acq_t.
Renamed page_cache_t field to default_reads_io_account_.
Made load_with_block_id take io_account parameter.
Revert "Made load_with_block_id take io_account parameter."

This reverts commit 9bac0a0ff910b9bcb4d379d907680aa7bd34c1da.
Revert "Renamed page_cache_t field to default_reads_io_account_."

This reverts commit 973973111dd5e1271f06f3406c7a63960ac977c6.
Revert "Added reads_io_account_ field to current_page_acq_t."

This reverts commit e1c14af39cf93eb59ccd213250e5e1433a566d20.
Moved the cache_account_ field to the (alt) txn_t.
Made reads_account_ and writes_account_ be an alt_cache_account_t.
Renamed alt_cache_account_t to cache_account_t.
Made cache_account_ field in txn_t be initialized to the default_reads_account.
Replaced reads_account_ with default_reads_account_.
Made actual (flawed?) use of file accounts.
Removed bad RSI.
Adjusted comment.
Put block_version_t in the alt namespace.
Made create_cache_account return value by move, made cache_account_t in its own file.
Made gathering of block tokens an LSI instead of an RSI.
Revert "Made gathering of block tokens an LSI instead of an RSI."

This reverts commit 62e39ff005a1b165aa687e463f775a36f56edcb6.
Made make_copy take an account.
Changed an RSI to an LSI.