Create more content for off-chain clients integrating with smart contracts

[briwylde08]

Create more content for off-chain clients integrating with smart contracts, specifically tutorials around using tokens (SAC & custom smart contract tokens).

[JakeUrban]

I think there is a lot of good guidance for offchain clients within our dapps content, but its buried in stuff a lot of readers won't find relevant (those who aren't building frontend's for their own contracts). I think an ideal approach would be to create sufficient documentation for integrating with smart contract protocols as an offchain client, and then reference that documentation in our content on building dapps.