Add support for 3d array literals with the syntax e.g. [| |1,2|3,4|,|5,6|7,8| |]
Add support for 3d array literals with the syntax e.g. [| |1,2|3,4|,|5,6|7,8| |]

jjdekker/libminizinc,jjdekker/libminizinc,jjdekker/libminizinc,jjdekker/libminizinc,tias/libminizinc,nathanielbaxter/libminizinc,nathanielbaxter/libminizinc,nathanielbaxter/libminizinc,tias/libminizinc,nathanielbaxter/libminizinc