CreatePatch creates a patch as specified in http://jsonpatch.com/ 'a' is original, 'b' is the modified document. Both are to be given as json encoded

compareArray generates remove and add operations for `av` and `bv`.

processArray processes `av` and `bv` calling `applyOp` whenever a value is absent. It keeps track of which indexes have already had `applyOp` called f

diff returns the (recursive) difference between a and b as an array of JsonPatchOperations.

Returns true if the values matches (must be json types) The types of the values must match, otherwise it will always return false If two map[string]in

TestArrayRemoveMulti tests removing multi groups. This tests that the correct index is removed

TestArrayRemoveSpaceInbetween tests removing one blank item from a group blanks which is in between non blank items which also end with a blank item.