fix bug in parsing default as all instead of distinct for set operations
change the ints in the syntax to be integers
partially add buildExprParser hack to deal with some nested prefix and
  postfix unary operators
add new file which starts going through the sql2003 grammar to try to
  create lots of examples for comprehensive testing of sql2003
  support.
replace the lexers with lexers from the tutorial project
refactor more of the parser to update with ideas from the tutorial
  parser
remove a huge number of 'try' calls in the parser
rename some of the parser functions which used prefix s to nicer names
update changelog
better sql 2003 todo list