constructive 1.0.1

• We fixed a typo that was breaking .cstr_new_class(, commented = TRUE)
• We fixed a bug regarding high precedence infix operators that was breaking deparse_call()
• "simpleUnit" is considered as a "grid" package class, not a "base" class and
  we fixed the check for corrupted "simpleUnit" objects
• The construction of "ScalesList" objects is improved, it failed in some cases
• The construction of "CoordCartesian" is improved and considers the "default" argument
• Improved vignette consistency