Add Tuple field names and Bool Type#485
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IyeOnline wants to merge 3 commits intoClickHouse:masterfrom
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This extends the type parser to support an element name alongside the element type and wires this through to make the field names in a tuple available in the C++ API.
Previously the library implicitly converted bool columns to `Uint8`, loosing type information. This commit introduces a "strong type" for `Bool` that is distinct from `bool`. This allows complete re-use of `ColumnVector` without triggering the `std::vector<bool>` specialization.
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This resolves two issues I just ran into when writing an integration to fetch data from ClickHouse.
Both changes are rather simple and self-contained in indivudual commits. Each adds a test for the newly added functionality.