Users Guide

The name of t he aut hor may not be used t o endor se or pr omot e pr oduct s der i ved f r om t hi s sof t war e
wi t hout speci f i c pr i or wr i t t en per mi ssi on.
3.
THI S SOFTWARE I S PROVI DED BY THE AUTHOR ` ` AS I S' ' AND ANY EXPRESS OR I MPLI ED WARRANTI ES, I NCLUDI NG, BUT NOT
LI MI TED TO, THE I MPLI ED WARRANTI ES OF MERCHANTABI LI TY AND FI TNESS FOR A PARTI CULAR PURPOSE ARE DI SCLAI MED. I N
NO EVENT SHALL THE AUTHOR BE LI ABLE FOR ANY DI RECT, I NDI RECT, I NCI DENTAL, SPECI AL, EXEMPLARY, OR
CONSEQUENTI AL DAMAGES ( I NCLUDI NG, BUT NOT LI MI TED TO, PROCUREMENT OF SUBSTI TUTE GOODS OR SERVI CES; LOSS OF
USE, DATA, OR PROFI TS; OR BUSI NESS I NTERRUPTI ON) HOWEVER CAUSED AND ON ANY THEORY OF LI ABI LI TY, WHETHER I N
CONTRACT, STRI CT LI ABI LI TY, OR TORT ( I NCLUDI NG NEGLI GENCE OR OTHERWI SE) ARI SI NG I N ANY WAY OUT OF THE USE OF
THI S SOFTWARE, EVEN I F ADVI SED OF THE POSSI BI LI TY OF SUCH DAMAGE.
GNU Li cense
GENERAL PUBLI C LI CENSE
Ver si on 2, June 1991
Copyr i ght ( C) 1989, 1991 Fr ee Sof t war e Foundat i on, I nc.
59 Templ e Pl ace, Sui t e 330, Bost on, MA 02111- 1307 USA
Ever yone i s per mi t t ed t o copy and di st r i but e ver bat i m copi es of t hi s l i cense document , but changi ng i t i s not
al l owed.
Pr eambl e
The l i censes f or most sof t war e ar e desi gned t o t ake away your f reedom t o shar e and change i t . By cont r ast ,
t he GNU Gener al Publ i c Li cense i s i nt ended t o guar ant ee your f r eedom t o shar e and change f r ee sof t war e- - t o
make sur e t he sof t war e i s f r ee f or al l i t s user s. Thi s Gener al Publ i c Li cense appl i es t o most of t he Fr ee
Sof t war e Foundat i on' s sof t war e and t o any ot her pr ogr am whose aut hor s commi t t o usi ng i t . ( Some ot her Fr ee
Sof t war e Foundat i on sof t war e i s cover ed by t he GNU Li br ar y Gener al Publ i c Li cense i nst ead. ) You can appl y i t
t o your pr ogr ams, t oo.
When we speak of f r ee sof t war e, we ar e r ef er r i ng t o f r eedom, not pr i ce. Our Gener al Publ i c Li censes ar e
desi gned t o make sur e t hat you have t he f r eedom t o di st r i but e copi es of f r ee sof t war e ( and char ge f or t hi s
ser vi ce i f you wi sh) , t hat you r ecei ve sour ce code or can get i t i f you want i t , t hat you can change t he
sof t war e or use pi eces of i t i n new f r ee pr ogr ams; and t hat you know you can do t hese t hi ngs.
To pr ot ect your ri ght s, we need t o make r est r i ct i ons t hat f or bi d anyone t o deny you t hese r i ght s or t o ask
you t o sur render t he r i ght s. These r est r i ct i ons t r ansl at e t o cer t ai n r esponsi bi l i t i es f or you i f you
di st r i but e copi es of t he sof t war e, or i f you modi f y i t .
For exampl e, i f you di st r i but e copi es of such a pr ogr am, whet her gr at i s or f or a f ee, you must gi ve t he
r eci pi ent s al l t he r i ght s t hat you have. You must make sur e t hat t hey, t oo, r ecei ve or can get t he sour ce
code. And you must show t hem t hese t er ms so t hey know t hei r ri ght s.
We pr ot ect your ri ght s wi t h t wo st eps: ( 1) copyr i ght t he sof t war e, and ( 2) of f er you t hi s l i cense whi ch gi ves
you l egal per mi ssi on t o copy, di st r i but e and/ or modi f y t he sof t war e.
Al so, f or each aut hor ' s pr ot ect i on and our s, we want t o make cer t ai n t hat ever yone under st ands t hat t her e i s
no war r ant y f or t hi s f r ee sof t war e. I f t he sof t war e i s modi f i ed by someone el se and passed on, we want i t s
r eci pi ent s t o know t hat what t hey have i s not t he or i gi nal , so t hat any pr obl ems i nt r oduced by ot her s wi l l
not r ef l ect on t he or i gi nal aut hor s' r eput at i ons.