changed the output of the schedulers to be just pending_transactions as those are tagged unions of pointers making them small and easily copyable without needing the additional indirection
implemented basic test cases to stochastically verify that order of transaction delivery does not affect schedulability

NB: we do not have the facilities to create/process these yet but they can be scheduled
scheduling is generated/signed agnostic though the block format still segregates them
chain_controllers _db now has indices for generated transactions.
tests using all signed transactions for now.

closes #139

add basic tests for scheduler

Implement and test remaining db functions

Eosc ext 125

added the ability to provide commands to eosc via std::cin. This may be interactive if reading from the console, or batched when a file is redirected for input.

added the ability to provide commands to eosc via std::cin. This may be interactive if reading from the console, or batched when a file is redirected for input.

Add missing built-in types to AbiSerializer and add support for Array types 

assign tag to image in dockerfile

merged apply, precondition and validate contexts into apply_context

Adjust standard docker makefile

Temporary add help command

1) add default command - help
2) prevent segfault

Fix typo

Added active key creation

complete abi conversion

Dockerfile patch

116 crypto api test