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Support loading polygon from SHP file
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<title>Shapelib License</title>
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<h1>License</h1>

The source for the Shapefile C Library is (c) 1998 Frank Warmerdam, 
and released under the following conditions.  The intent is that anyone
can do anything with the code, but that I do not assume any liability, nor
express any warranty for this code.  <p>

As of Shapelib 1.2.6 the core portions of the library are made available
under two possible licenses.  The licensee can choose to use the code
under either the Library GNU Public License (LGPL) described in 
COPYING or under the following MIT style license.  Any files in
the Shapelib distribution without explicit copyright license terms
(such as this documentation, the Makefile and so forth) should be
considered to have the following licensing terms.  Some auxilary portions
of Shapelib, notably some of the components in the contrib directory
come under slightly different license restrictions.  Check the source
files that you are actually using for conditions.<p>

<h3>Default License Terms</h3>

<quote>
Copyright (c) 1999, Frank Warmerdam<p>

This software is available under the following "MIT Style" license,
or at the option of the licensee under the LGPL (see COPYING).  This
option is discussed in more detail in shapelib.html.<p>
 
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:<p>

The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.<p>

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.<p>
</quote>

<h3>Shapelib Modifications</h3>

I am pleased to receive bug fixes, and improvements for Shapelib.  Unless
the submissions indicate otherwise I will assume that changes submitted to
me remain under the the above "dual license" terms.  If changes are made
to the library with the intention that those changes should be protected by
the LGPL then I should be informed upon submission.  Note that I will not
generally incorporate changes into the core of Shapelib that are protected 
under the LGPL as this would effectively limit the whole file and 
distribution to LGPL terms.<p>

<h3>Opting for LGPL</h3>

For licensee's opting to use Shapelib under LGPL as opposed to the MIT
Style license above, and wishing to redistribute the software based on 
Shapelib, I would ask that all "dual license" modules be updated to
indicate that only the LGPL (and not the MIT Style license) applies.  This
action represents opting for the LGPL, and thereafter LGPL terms apply to
any redistribution and modification of the affected modules.<p>

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