fixed bug in name of error_info typedef
Fix for Trie roots.
AddressState -> Account.
Full documentation for Account class.
Minor comments.
Merge branch 'develop' of github.com:ethereum/cpp-ethereum into develop

Conflicts:
	libethereum/Executive.cpp
Deprecate Memory::require(size) function. Risk of unsigned integer overflow.
Remove Memory::require(size) interface [#81773288]
Merge remote-tracking branch 'upstream/develop' into bugfix
Renamed storageOverlay() to storage() in Account.h
Change Constant::get to support negative values
Handle unsigned integer overflow in Memory::require() [Delivers #81773288]
Rename storage() -> storageOverlay().
Merge branch 'develop' into develop-evmcc
Update Visual Studio project file for LibEthereum
Merge branch 'develop-evmcc' into pr-jit