Add simple example of using the timer API

[SilverPoker]

when running the following command for profiling

cargo build --features timer

The error appears:

Package `marlin v0.1.0 (/home/zy/Desktop/github/marlin)` does not have these features: `timer`

How to add this feature in the package? It seems that only modifying Cargo.toml is enough, but I am not familiar with rust.....

[Pratyush]

Oops, sorry! The README is outdated; the timer feature was renamed to print-trace, so the command is actually cargo build --features print-trace. However, the repo currently doesn't contain an example end-to-end binary that would print out the trace. I'll add one soon, so that you can get a sense of the heavy components.

[SilverPoker]

Ok, thanks for your reply. Hope to see the end-to-end example very much !

[Pratyush]

I've fixed the README, and will soon add a small example to the repo.

[ssahai]

Any updates for the example?