Merge branch 'release/0.1.1'

* release/0.1.1:
  Correct shortopt in help message
  Add Lorenz information to README file
  Improve error messages for usability
  Default --every=1 and reformat --help
  Add TODO re: simulation time drift
  Avoid cout << const char * when char will do
  Basic usability tweaks from initial testing
  draft Lorenz attractor binary
  Add Makefile to Doxygen
  Add Kahan citation
Merge branch 'master' into develop

* master: