Add some basic instructions to the README
Add some basic instructions to the README

Closes #76

oktapodia/decrediton-appveyor-test,decred/decrediton,decred/decrediton,oktapodia/decrediton-appveyor-test,oktapodia/decrediton-appveyor-test,oktapodia/decrediton-appveyor-test,decred/decrediton,oktapodia/decrediton-appveyor-test,decred/decrediton,decred/decrediton,decred/decrediton