CSV Parser for DataInitializer

[CodeLionX]

Proposed Changes

• generic CSVParser for relations
  • read/write csv file
  • read/write csv strings
• provides implicits to read and write relation from/to files:

val rel: Relation = _
val file = new File("rel.csv")

rel.writeToFile(file)
val readRel = rel.readFromFile(file) //or:
val readRel2 = <RelationDef>.readFromFile(file)

• provides implicits to read and write relation from/to string:

val rel: Relation = _
val file = new File("rel.csv")

val csvString = rel.writeToCsv()
val readRel = rel.readFromCsv(csvString) //or:
val readRel2 = <RelationDef>.readFromCsv(csvString)

Related

• depends on #77

• 53

[CodeLionX]

i'm currently adding scaladoc

EDIT: done!