cleanup
new generated code
new SDF3 changelog
Update changeLog.md

fix md style
adding trans/utils
build using macros
new builder extract productions
changing the imported signature
removing old sdf derived files
signature library
changing the imported signature
allow productive productions in variables section
including new features (productive productions and new extract productions builder) in the changelog
disallowing regular symbols (A?, A+, A*) to have regular symbols as their children (lists of lists, optional of lists, etc)
allowing alternatives in lexical syntax
fix newline coding on different OS
check for alternatives and regular symbols that are not Sort*, Sort+ or Sort? in context-free syntax
updates in the include folder
better error messages when applying a builder
cleanup