Test for dawn515 stat537

STAT-538 Checktime Port from dawn-2.x

Remove code to enable mongo compile.

Update README.md

Update rpc.dox

fixed stale reference if the transaction meta was moved (and it was), fixed the lack of cleanup for the pending transaction metas

Eosbios

Fix compiler errors on master

fixes for the build post-merge from master, though some of these fixes were probably needed pre-merge

removed unit tests for deprecated native contract actions

moved EOS transfers in the unit tests over to ABI serializer assisted methods (also in the tester library)

Removed stake from the newaccount tests and the corresponding abi tests

removed the benchmark command and several other now deprecated commands from eosioc

manual merge much of identity and master

DAWN-529 Reject Invalid Handshake Messages

compressed transactions

adding apis to expose transaction to WASM

moved just-in-time transaction packing to `apply_context` instead of the intrinsic, added/renamed intrinsics to match precedence set by the action api, added entries in the appropriate eosiolib hpp file

remove init() contract ABI call from setcode

Separated asset symbol into an independent class