Refs Tokutek/ft-index#46 Add dynamic-value omt clone

Refs Tokutek/ft-index#46 bndata uses dmt instead of omt

snapshot

snapshot

snapshot: conver omtdata to struct instead of struct*

snapshot: convers adding le_offset to klpair

Implemented more.. snapshot

Implemented more.. snapshot

implement delete/free

snapshot, finished implementing bndata

fix a few bugs, maintain key sizes

fix incorrect assert

Make nodes not be packed, fixes uses of copy constructor

Fix a couple of bugs

fix compiler warnings

do 4 byte alignment for dmt nodes, and 64 byte alignment for all mempools.

Bugfix in delete: when swapping nodes, take over rebalance responsibility (when appropriate)