Refactor Context's arg storage to use Lexicon
Refactor Context's arg storage to use Lexicon

kejbaly2/invoke,pyinvoke/invoke,pfmoore/invoke,sophacles/invoke,tyewang/invoke,mattrobenolt/invoke,kejbaly2/invoke,mkusz/invoke,mattrobenolt/invoke,frol/invoke,frol/invoke,singingwolfboy/invoke,mkusz/invoke,alex/invoke,pyinvoke/invoke,pfmoore/invoke