fix positions?
small fixes to haddock
add notes to top of lexer module
simplify line comment lexer
remove some trys from lexer
fix the block comment parser to return all the comment text when there
are embedded / * in the comment
refactor the symbol, keyword and identifier blacklist checking into
the low level token parsers instead of a separate step using guard
work on the haddock
remove the old attoparsec position stuff from the lexer
change the lexer to accept position info in the same way as the parser
replace sqlindent with new test exe which can parse, lex and indent
