Use owl-diff library for diff operation. Add markdown and html diff output formats.#461

Merged

jamesaoverton merged 12 commits intoontodev:masterfrom balhoff:owl-diff

Jun 11, 2019

+89-46

Commits on Jun 10, 2019

Update owl-diff for functional syntax bug fix. Update example output to reflect URI shortening.
balhoff
committed

Commits on Jun 11, 2019

Revert integration test, add 'plain', 'pretty'
jamesaoverton
committed