[3170] The definition of the transformation language
[3169] Naming consistent with GrammarLab, not SLPS
[3171] Accociativity transformation operators refactored
[3348] Add the old code of GDT, adapt it to fit GrammarLab: the idea is to have a testing infrastructure
[3520] grammarlab::extract::EBNF2Rascal from SLPS/topics/extraction/edd2rsc
[3556] Rascal code generated from the EBNF definition, almost works