User's Manual

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Whenwespeakoffreesoftware,wearereferringtofreedom,notprice.
OurGeneralPublicLicensesaredesignedtomakesurethatyouhave
thefreedomtodistributecopiesoffreesoftware(andchargeforthis
serviceifyouwish),thatyoureceivesourcecodeorcangetitifyou
wantit,thatyoucanchangethesoftwareorusepiecesofitinnew
free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) oer 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modied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reectonthe
originalauthors’reputations.