Copyright (c) 2005 - 2018 Paul Koning, Joe Stanton, Dale Sinder

This software is provided 'as-is', without any express or implied warranty.
In no event will the author be held liable for any damages arising from
the use of this software.

Permission is granted to anyone to use this software for any purpose and
to alter it and redistribute it, subject to the following restrictions:

1. The origin of this software must not be misrepresented; you must not
   claim that you wrote the original software.

2. Altered source versions must be marked as such, and must not be
   misrepresented as being the original software.

3. If you make changes to the software the author would appreciate it if
   you would feed back the changes (but you are not required to).

4. This notice may not be removed or altered from any source or binary
   distribution.

External components:

Pterm uses a number of libraries provided by others:

wxWidgets:

Copyright (c) 1992-2013 Julian Smart, Vadim Zeitlin, Stefan Csomor,
Robert Roebling, and other members of the wxWidgets team,

See http://docs.wxwidgets.org/3.0.0/page_copyright_wxlicense.html for
the wxWidgets license.

SDL:

Simple DirectMedia Layer
Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
  
This software is provided 'as-is', without any express or implied
warranty.  In no event will the authors be held liable for any damages
arising from the use of this software.

Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
  
1. The origin of this software must not be misrepresented; you must not
   claim that you wrote the original software. If you use this software
   in a product, an acknowledgment in the product documentation would be
   appreciated but is not required. 
2. Altered source versions must be plainly marked as such, and must not be
   misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.

libsndfile:

By Erik de Castro Lopo <erikd@mega-nerd.com> and others.

libsndfile is licensed under the LGPL, see
http://www.gnu.org/copyleft/lesser.html for the text of that license.
