Attribute management from rDNA

[leifeld]

Some ideas in addition to dna_getAttributes and dna_setAttributes:

• dna_addEntity(int variableId, String entity), dna_addEntity(int statementTypeId, String variable, String entity), dna_addEntity(String statementType, String variable, String entity)
• dna_editEntity(int entityId, String newValue, String newColor, recode = FALSE), dna_editEntity(int variableId, String entityValue, String newEntityValue, recode = FALSE) // same combinations as above as well with statement type etc.
• dna_removeEntity
• dna_setAttributeValue
• dna_addAttributeVariable
• dna_removeAttributeVariable
• dna_renameAttributeVariable
• dna_getAttributeVariables
• dna_cleanUpEntities
• dna_entityFrequencies