- changed hints to refer to the "do" command instead of copying
- using UTF8 encoding to handle acute letters during command printing. the do command still gets it wrong but Notepad++ is ok and from there it can be copy/pasted
- Stata complains if we try to label strings and stops processing the .do file. We can check that only numerics are labeled, but for testing the printing is left in. Otherwise what's the guarantee that the type can be safely defined as numeric? They can use a view or something to change the type in the DB.
- moved out DwColumn into separate file to reduce size

- moved constant parameter in translation queries into the SQL
- fixed parsing of command beginning with "if", not mistaking it for a variable
- added checks to see if the items on the label_variable or label_values list are valid
- check that the command word after lowercase/uppercase/nulldata are not mistyped