Fix support for type 'E' multiple response sets in SPSS SAV files

[slobodan-ilic]

Fixes #346

Description

This PR adds support for type 'E' multiple response sets in SPSS SAV files. These are dichotomies with CATEGORYLABELS=COUNTEDVALUES and appear in subtype 19 records in addition to the already supported subtype 7.

Changes

1. Added a constant in
2. Modified the Ragel grammar in to handle type 'E' format with its additional parameters
3. Updated the code to set flag for both types 'D' and 'E'
4. Modified the condition in to handle both subtypes 7 and 19

Testing

I've tested the changes with files containing type 'E' multiple response sets, and they are now correctly parsed.