Log Message:
audio/fasttracker2: Updates to v1.35

Changes since v1.34

v1.35 - 27.09.2020
- Added an option to change interpolation mode to 2-tap linear, just to match
  real FT2. This interpolation method is of worse quality than the current one
  (4-tap cubic spline).
- Fixed some sample tap bugs with the cubic spline resampling interpolation
- Fixed an issue where unwanted sample data could be shown at the loop end
  point of a looped sample in the sample editor.
- Updated some parts of the help text
- Small code cleanup