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License   

All free software provided by Opal Consulting is available under the terms of the following license:

Copyright (c) 2012, Dietmar Aust, Opal-Consulting
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
* Neither the name Opal-Consulting nor the
names of the contributors may be used to endorse or promote products
derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Please note that the software is only released in binary form, the source code is not provided.

This license is based on the 3-clause license ("New BSD License").

So what does this legalese mean?   

The BSD style license is very different from the GNU Public License. While the GNU license puts all sorts of restrictions on what you can do with the software, BSD-style licenses say "Hey, do what you like, we don't care. Just let people know we wrote it, and don't sue us." That's really all there is to it.

The first paragraph with the numbered items says you can do what you like with the code, as long as you keep our name on it. And you cannot use our name(s) for advertising.

The second paragraph, all in capital letters, is a standard legal boilerplate notification that tries to make it difficult for anyone to successfully sue us over the software.