- 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

Also, it now checks to ensure the proposed producer schedule would actually change the schedule.

singleton takes code and scope as runtime-parameters, global_state_singleton restored in system contract, hack to prevent llvm-linker from removing apply function #2227

system contract refactoring - move code from .hpp to .cpp, use new dispatcher (some code temporarily commented out) #2227

Removed mindelay action since the `delay_sec` field makes it unnecessary.

Additional unit tests to test the new semantics of delay_sec are needed.

Also, apply_block and push_transaction now respect the skip_authority_check flag.

implment stub of new eosio.msig contract using new contract structure
define eosio.msig abi
eoslib name class now uses {} rather than constructor and uses magic_get
serialization

- disable mongo test that doesn't work
- remove extra param from set_resource_limits

typos, removed PACKED, use time typedef in voter_info, remove
unnecessary padding