Rune - Implement runeid_t, hashed identifiers, and #id

Rune - Implement runeid_t, hashed identifiers, and #id

* Expand the lexer to support '#id', which produces a 64-bit
  unsigned integer representing the runeid_t hash for the identifier.

  We now support in total:

  # comment	('#' + space + comment to end of line).  Can be used
		for general code comments.

  #%comment	('#' + '%' + comment to end of line).  Can be used
		for documentation meta-data.

  #!shell	('#' + '!' + (ignored by parser).  # must be in the
		first column.  Used to script the Run interpreter.

  #id		Generates a 64-bit runeid_t hash.  Must not be in
		the first column (since in the first column this form
		represents a preprocessor directive).

  #directive	RESERVED FOR FUTURE PREPROCESSOR DIRECTIVES

  To do this, we disallow '#comment' (without whitespace).  It
  only took a few edits of classes to clean those up, so I think
  overloading all of these # features will work out.

* Replace nearly all identifiers stored in various structures
  with the new 64-bit hash runeid_t.  They used to be string-table
  identifiers, now they are not.

  NOTE: The DLL symbol lookups are currently broken due to this
	change.

* Add ex_Str to struct Exp for double-quoted strings and anything
  else that still needs to be a string.

* Remove all String_* globals in favor of HASHID_* constants.  Directly
  parse code blocks casing HASHID_* constants instead of using the
  string-table mechanism.  This significantly reudces string-table
  overhead.

* Remove all SPECIAL* string table identifiers in favor of HASHID_*
  switches.

* The Parser now calculates TOK_INTEGER and TOK_FLOAT, and TOK_SSTRING,
  instead of waiting until the resolver gets to it.  This allows us to
  remove remove yet more string table stuff.

* Fix access to dynamic type data in the code generator.