Fix typo in var name
standalone parsers

* add the option to copy the runtime to a standalone parser file
* clean up the options to the parser generator to reflect the runtime
  changes
* "debug data" (now used by the default runtime) and line tracking
  can no longer be disabled (but the line tracking may be moved
  to the InputFile abstraction in future, thereby allowing disabling
  of line tracking)
bugfix: pass the filename to the bootstrap parser
unify parsing and interpretation of string literals

* the pyLRp parser now handles string literals uniformly
* the stoken regex has been adapted