parser and pretty printer for statements
add query statement
add support for
insert
update
delete
truncate
bonus ddl:
limited create schema
drop schema
add grammar notes to the new test files
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
