* Push entire elements onto openingStack rather than type strings
* When closing an element, build a clone of the opening and push it onto
closedElements, then insert that clone when reopening the element
Change-Id: I8b0fb44394aed6c471dc6dacaab03e44c2333733
Also:
* Refactored tests
* Added tests for ve.dm.Transaction.newFromInsertion
* Added tests for ve.dm.Transaction.newFromRemoval
* Fixed problems with ve.dm.Transaction.newFromInsertion
* Added ve.dm.Node.canBeMergedWith which is partially a port of ve.Node.getCommonAncestorPaths merged with canMerge from within ve.dm.DocumentNode.prepareRemoval from the old ve codebase
Change-Id: Ibbc3887d08286d8ab33fd6296487802d65b319fa
The 'insert' and 'remove' operations weren't implemented in the
transaction processor and were a holdover from the old DM
implementation.
Also migrated the tests, especially those that asserted that consecutive
insert/remove operations were combined (this is no longer the case now
that they are replace operations)
Change-Id: I2379fe92b331c5316f70f4b695397da41581cce9
