Implement dynamic recordset

[sand1k]

Dynamic recordset is a storage based on a chunked list, required to reduce fragmentation in case of frequent allocations / deallocations of big data blocks.

Blocks #45, #46.

[LaszloLango]

CC: @szledan

[ruben-ayrapetyan]

Merged:

• chunked list - Introducing chunked lists (list of nodes that exactly fit the heap chunk size) #65;
• recordset storage - Recordset dynamic storage #72;
• record iterator - Literal storage #148.