Merge branch 'master' into ott
moving read/write_as_json to utility.input_output where they belong
Importing *_as_json directly from new location.

This is not required, but makes sense for the library
to refer to its own functions by their actual location.
Merge branch 'master' of github.com:OpenTreeOfLife/peyotl into as-json-to-utility
Merge pull request #71 from OpenTreeOfLife/as-json-to-utility

Add json to utility