Update Kmers documentation

[mrperkett]

• Add to Basic Usage
  https://genome-kmers.readthedocs.io/en/latest/overview.html#basic-usage

• Update Examples list
  https://genome-kmers.readthedocs.io/en/latest/examples.html

• Update Profiling information
  https://genome-kmers.readthedocs.io/en/latest/development.html#profiling