SFS Toolbox 2.4.1

New version of the Sound Field Synthesis Toolbox, for documentation see http://matlab.sfstoolbox.org/en/2.4.1.
This release fixes small bugs and includes mono-frequent simulations of local Wave Field Synthesis (LWFS) using spatial bandwidth-limitation.

NEWS:

    - add monochromatic implementation of LWFS using spatial bandwidth-limitation
    - add monochromatic circular expansion functions for ps and pw
    - add function for conversion from circular to plane wave expansion
    - add freq_response_* and time_response_* for all LWFS methods
    - add optional message arg to progress_bar()
    - fix missing conf.N in freq_response_nfchoa()
    - fix auralize_ir() for local files