* WIP
* Fix merge corner cases
* Add test for explicit !!merge tag
* Fix tests
* Cleanup
* Cleanup
* Fix deanchoring lists
* Add test case for keeping comments
* Add MapEntrySetter and fix json marshalling after deanchoring
* Keep duplicated keys
* Move MergeTag definition to yaml alias
* Remove go-spew from api
* Add support for sequence nodes on merge tags
* Add docstring to MapEntrySetter.Key
* Add docstring to MapEntrySetter struct
* Add tests to MapEntrySetter
* Fix duplicate merge key
* Revert whitespace changes on forked go-yaml
* Remove AssocMapEntry function
* Refactoring merge order
* Return errors on VisitFields and PipeE
* Add tests for each non-conforming map merges