UI Changes

Changes
- UI now automatically puts title/author from input file into the fields
as well as setting spacing
- UI now has actionlisteners for spacing, author and subtitle
- Slider now takes values from 1 to 99, then divides by 10 to get the
appropriate float value for spacing.

Things to do:
Need to:
- Data validation
- Add helpdoc
- Center double digit numbers
- Properly space double digit numbers
- Find a way to warn user of invalid data