Updating README and adding in license notice for sofar

Entry point to convert SHD HRIRs to CLDFB domain HRIRs is SHD_2_ROM.m.

Python 3.9.x needs to be installed with the sofar python module. The convert_SD2SHD_HRIRs.m script needs the path to this python.

Matlab 2020 has seen some issues with using python, so use a newer version if possible.

Matlab 2020 has seen some issues with using python, so use a newer version if possible. If you are unable to use a newer matlab version, try loading in the OS default python, as this works sometimes.

Applies to sofar 

Copyright (c) [2021] [The pyfar developers]

Permission is hereby granted, free of charge, to any person obtaining a copy

of this software and associated documentation files (the "Software"), to deal

in the Software without restriction, including without limitation the rights

to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

copies of the Software, and to permit persons to whom the Software is

furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all

copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

SOFTWARE.

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