New features

• Added list operators expressions :
  • :+ : list append (list + elem -> list).
  • :- : list remove (list + elem -> list).
  • :/ : list remove (at index) (list + int -> list).
  • :? : list contains test (list + elem -> boolean).
• Added standard break and continue statements.

Bug-fix

• Fixed null comparison with != operator.
• Variables will mutate in a block (when defined in parent block).
• Variables can properly be set to null.
• Added type inducing (when first declared as null).
• The define keyword may be implicit.