1. transfers are now prevented where from/to are same
2. inline transfers to self are now skipped (eosio staking for others)
3. unit test updated to demonstrate staking works

Move deadline specification to chain_plugin

Wasm injector refactor

Fixed deferred transaction soft fail crash

nodeos crash fix

Yet more builtins

Update launcher to reflect history plugin rename.

Replace eager memory usage checks with a deferred check at the end of the transaction

Fix for eos #2675 (!"unresolvable": env.__fixunsdfti)

Working fine for binaryen on Linux, wavm still fails because of compiling the additional injected instructions

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

Api tests