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programs; and that you know you can do these
things.
To
protect your rights, we need to make
restrictions that forbid anyone to deny you
these rights or
to
ask you
to
surrender the
rights.
These restrictions translate to certain
responsibilities for you if you distribute copies
of the software, or if you modify
it.
For example, if you distribute copies of such a
program, whether gratis or for a fee, you must
give the recipients all the rights that you have.
You
must make sure that they, too, receive or
can get the source code. And you must show
them these terms so they know their rights.
We
protect your rights with two steps:
(1) copyright the software, and (2) offer you
this license which gives you legal permission
to copy, distribute and/or modify the software.
Also, for each author's protection and ours,we
want to make certain that everyone
understands that there
is
no
warranty for this
free software.
If
the software
is
modified by
someone else and passed on, we want its
recipients to know that what they have
is
not
the original,
so'
that any problems introduced
by others will not reflect
on
the original authors'
reputations.
Finally, any free program
is
threatened
constantly by software patents.
We
wish to
avoid the danger that redistributors of a free
program will individually obtain patent
licenses,
in
effect making the program
proprietary.
To
prevent this, we have made it
clear that any patent must be licensed for
everyone's free use or not licensed at all.
The precise terms and conditions for copying,
distribution and modification follow.
GNU GENERAL PUBLIC LICENSE
TERMS AND CONDITIONS FOR COPYING,
DISTRIBUTION AND MODIFICATION
O.
This License applies to any program or other
work which contains a notice placed by the
copyright holder saying
it
may be distributed
under the terms of this General Public License.
The "Program", below, refers to any such
program or work, and a "work based
on
the
Program" mean$ either the Program or any
derivative work under copyright law: that
is
to
say, a work containing the Program or a portion
of
it,
either verbatim or with modifications and/
or translated into another language.
(Hereinafter, translation
is
included without
limitation
in
the term "modification".) Each
licensee
is
addressed
as
"you".
Activities other than copying, distribution and
modification are not covered by this License;
they are outside its scope. The act of running
the Program
is
not restricted, and the output
from the Program
is
covered only if its contents
constitute a work based
on
the Program
(independent of having been made by running
the Program).
Whether that
is
true depends
on
what the
Program does.
1.
You
may
copy
and distribute verbatim
copies of the Program's source code as you
receive
it,
in
any medium, provided that you
conspicuously and appropriately publish
on
each copy
an
appropriate copyright notice
and disclaimer of warranty; keep intact all the
notices that refer to this License and to the
absence of any warranty; and give any other
recipients of the Program a copy of this
License along with the Program.
You may charge a fee for the physical act of
transferring a copy, and you may at your option
offer warranty protection
in
exchange for a fee.
2.
You may modify your copy or copies of the
Program or any portion of
it,
thus forming a
work based
on
the Program, and
copy
and
distribute such modifications or work under the
terms of Section 1 above, provided that you
also meet
all
of these conditions:
a)
You
must cause the modified files to
carry prominent notices stating that you
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