* load all known tags
* load tag replacements
* recieve allTags  =>  append to internal all known tags
* change_allTags  =>  append array to this event
* new image  =>  read tags
* removeTag
* addTag
* learnReplacement
* updateReplaceTags
* addCurrentTagsToAllTags
* new remaps  =>  apply remapped tags  (if they're missing)
* change_tags  =>  remap tags
* request_allTags
* request_replaceTags