Alters the transaction-types transformation so that it uses the @code
attribute in the csv transformation

Currently, in the csv transformation, the string value is returned in
the transaction-types column. The @code attribute is a better value to use.
I guess if we wanted we could output both.
Adds a column back in for the text of a transaction-type

The previous commit just altered the data in the transaction-types
column. This commit adds a new column so we get both the text
and a code.
Merge pull request #6 from caprenter/master

Alters the transaction-types transformation so that it uses the @code attribute in the csv transformation