Add the option "engine" to sav reading (dataset.read_spss). This means we can use the pyreadstat to read SPSS files and meta data.
Pros:
- Faster
- More robust (won't fail under certain circumstances savReaderWriter fails)
- Easier to use on multiple platforms
Cons:
- Doesn't support SPSS sets (like multiple choice questions) so users will have to create them afterwards (only one line of code)