todo
update github project name
Merge branch '0.2.0'
update TODO, changelog and cabal package version
fixes for substring, change the abstract syntax for extract and
  substring, and add the addition operators position, convert,
  translate, overlay and trim
renames OrderField->SortSpec, InThing->InPredValue
update TODO
rename PrettyIt to SQLIdent and add to cabal
rename Duplicates -> SetQuantifier + qeDuplicates -> qeSetQuantifier
add parsing for more multi keyword type names
add support for ? for parameterized queries
update changelog and TODO
update changelog
rename ScalarExpr -> ValueExpr which is slightly more standard, add notes on new fixity implementation
fixes to haddock and update changelog
change pretty printer to output 'fetch first' instead of 'fetch next'