Create simple template examples

[edaub]

The current benchmarks are quite thorough, which can make them difficult to adapt for users that just want to use one particular feature. Addition of some simple templates that show how to use one particular feature would be helpful for users. (In previous software I have written, these examples get read and used about 100x more often than the actual documentation!)

[edaub]

This has been improved in PRs #116 and #124. I am still hoping to add some multi-output examples, as well as a history matching one.