Storage explorer for Neo Express

[djnicholson]

Fixes #97

[devhawk]

A good first start. Can we file issues to track the following?

• Allowing the user to specify the type (hex string, utf8 string, integer, etc) of a given key or value instead of showing all possible options? Not sure where that info would be persisted.
• Many contract use a storage map to store key/value pairs inside an existing storage item (example: https://github.com/neo-ngd/CNEO-Contract/blob/master/NeoContract/CNEO.cs#L117). It would be nice if we could split those out ("storage map" would be another type the user can specify). I just filed a similar issue on the debugger: Expand out storage maps in variables view neo-debugger#15

[djnicholson]

A good first start. Can we file issues to track the following?

• Allowing the user to specify the type (hex string, utf8 string, integer, etc) of a given key or value instead of showing all possible options? Not sure where that info would be persisted.
• Many contract use a storage map to store key/value pairs inside an existing storage item (example: https://github.com/neo-ngd/CNEO-Contract/blob/master/NeoContract/CNEO.cs#L117). It would be nice if we could split those out ("storage map" would be another type the user can specify). I just filed a similar issue on the debugger: neo-project/neo-debugger#15

Opened #123 and #124