[GH-78] Create the initial launcher version.

[ksaric]

#78

It turns out that this simple launcher is good enough for now, we have yet to define the configuration.

[HirotoShioi]

I got two exceptions:

1. When running main, it throws exception saying directory wallet does not exist.
   *** Exception: ./wallet: createProcess: runInteractiveProcess: exec: does not exist (No such file or directory)
2. When I create directory wallet and run again, I still get exception saying that it does not have permission.
   *** Exception: ./wallet: createProcess: runInteractiveProcess: exec: permission denied (Permission denied)

[HirotoShioi]

LGTM