Initial doc to storage evm functions (#915)
Initial doc to storage evm functions (#915)

* Initial doc to storage evm functions

* CC

* Make evm.world_state private so access is _restricted_ via methods

* Add forgotten import for get_storage_items

* Minor doc improvements

trailofbits/manticore,montyly/manticore,trailofbits/manticore,montyly/manticore,trailofbits/manticore