try adding link in readme

README.md

@@ -20,7 +20,7 @@ A self-contained C99 library that provides a subset of [Squiggle](https://www.sq
 
 You can follow some example usage in the examples/ folder
 
-1. In the 1st example, we define a small model, and draw one sample from it
+1. In the [1st example](src/branch/master/examples/01_one_sample/example.c), we define a small model, and draw one sample from it
 2. In the 2nd example, we define a small model, and return many samples
 3. In the 3rd example, we use a gcc extension—nested functions—to rewrite the code from point 2. in a more linear way.
 4. In the 4th example, we define some simple cdfs, and we draw samples from those cdfs. We see that this approach is slower than using the built-in samplers, e.g., the normal sampler.