Add diffs for deleted paragraphs
Starting to deal with additions to the tree
Additions are now shown correctly in the diff view
Children sorting works with roman numerals, and integers correctly. Started layer application
Added diff layer logic, which is fairly different o normal layer logic
Added some basic layers to diffs
Tests are too complicated, pulling them out
Added some tests
Merge branch 'master' of github.com:eregs/regulations-site into delete_add_diff
Merge pull request #295 from khandelwal/delete_add_diff

Diffs Part Two