text: Title: Log Uniform distribution
  Body: How about a Log Uniform distribution, i.e., the log of a variable is uniformly distributed. Implementation:
  
  ```
  class LogUniform(dist.Uniform):
      def sample(self, key, sample_shape=()):
          shape = sample_shape + self.batch_shape
          sample = jax.random.uniform(key, shape=shape, minval=jnp.log(self.low), maxval=jnp.log(self.high))
          return jnp.exp(sample)
  ```
  
  A more polished version would check that low and high are both > 0. This is rather simple for users to do, but quite convenient. 
  