each transaction's ranges instead of a hand-rolled buffer.

db->getf_set now perform zero mallocs. Also, move the is_temporary
bit into the cursor constructor.

functor instead of a macro for iterate.

rest of the code base

appropriate headers

This reverts commit d051cb71.

This reverts commit 467a5a99.

Variable key overwrite dmt

using different length (but equal) keys, using various overwrite methods
and interleaved aborts.

This reverts commit c58c4949.

changed ft-verify to work with promotion

fixes #250

partial eviction would fail to move stale messages out of the fresh
message tree before serializing them to memory.

Optimize rightmost inserts and unique checks using a constant rightmost leaf and a heuristic stored in the FT

non-root leaf node in each FT. When the FT detects a rightmost insertion
pattern, it attempts to do inserts and unique checks directly into the
rightmost leaf node, greatly optimizing sequential insert speed.