Edit README.asc for the preprocessor
pp/PPDefs.Code: move to upper level parser/Code

It will be used both by the preprocessor and the lexer.

Separated the terminals for use only by the preprocessor.
Prepr: add close() method
parser: define C reserved words
parser: remove unneeded class Lexer
bison: update Bison 3.0's Java LALR skeleton to support %destructor
Groundwork for Bison parsing
parser.y: add the string representation of each token