- signature checks are skipped while replaying
- abi of eosio.system contract was inconsistant, Fix #2999
- reduced console spam while syncing and replaying
- add max usage of resources when querying account

- update system contract with setram that properly updates market
pricing

- buy & sell ram using bancor algorithm
- ram is no longer delgated
- fixed warning with double secondary index
- add block_timestamp_type

- udpate system contract to set initial account bw to 0
- update system contract to process new on block header
- update cleos api and get info api

added tests for the WASM currency contract and fixed issues it exposed, refactored contract initialization as a require_recipient where the logic of init vs apply is now in the wasm_interface

Added test for basic wasm contract loading/unloading.  Fixed bugs in the intrinsic code and made it impossible to complile with the same class of bugs in the future.  Did some basic style/renaming in the contracts directory and in the enclosed tutorial/doxygen files

1. remove ordered_non_unique non-deterministic indices from producer
scheduling
2. added API to return contents of i64 tables
3. updated documentation to reflect deprecation of precondition and
validate
4. remove calls to WASM precondition and validate, but keep them for
native contracts

- implement a large part of example exchange contract

TODO: replace Makefile with CMakeLists