SFS Toolbox 1.1.0

New version including local WFS and a lot of bug fixes.

NEWS:

- fix amplitude bug in get_ir() and ir_generic()
- remove direct gnuplot plotting
- add support for local Wave Field Synthesis
- the length of the dirac impulse response is now an option for dummy_irs()
- fix iseven(), isodd() for very large numbers
- correct the sign for Wave Field Synthesis driving functions