repl load contract directly into shell

[thepiwo]

"When you load a contract with some name, it would make sense to immediately query :l contractname.aes, because it's not obvious that it's necessary in order to put the contract in the scope (this separation makes sense with more contracts around, but not with a single one)"

as discussed with @radrow it would make sense for the repl channel to have a command to do both at the same time to streamline operation