PIDF - examples with new priority

I corrected the examples to:
--  use the new priority values
-- consistently use the namespace without the final ";" (some examples in
the draft used the final ":" and some didn't).  The text also needs to
change because it is inconsistent in sometimes using the final ":".

------ Examples below all validate with new schema ------

section 4.2.2a

       <?xml version="1.0" encoding="UTF-8"?>
       <impp:presence xmlns:impp="urn:ietf:params:xml:ns:cpim-pidf" 
           entity="pres:[email protected]">
         <impp:tuple id="mobile-phone">
           <impp:status>
             <impp:basic>open</impp:basic>
           </impp:status>
           <impp:contact priority="0.8">tel:09012345678</impp:contact>
         </impp:tuple>
       </impp:presence>

section 4.2.2b

      <?xml version="1.0" encoding="UTF-8"?>
       <presence xmlns="urn:ietf:params:xml:ns:cpim-pidf"
           entity="pres:[email protected]">
         <tuple id="mobile-phone">
           <status>
             <basic>open</basic>
           </status>
           <contact priority="0.9">tel:09012345678</contact>
         </tuple>
       </presence>

section 4.2.4

       <?xml version="1.0" encoding="UTF-8"?>
       <presence xmlns="urn:ietf:params:xml:ns:cpim-pidf"
           xmlns:local="urn:example-com:pidf-status-type"
           entity="pres:[email protected]">
         <tuple id="im">
           <status>
             <basic>open</basic>
             <local:location>home</local:location>
           </status>
           <contact>im:[email protected]</contact>
         </tuple>
       </presence>

section 4.3.1

 <?xml version="1.0" encoding="UTF-8"?>
   <presence xmlns="urn:ietf:params:xml:ns:cpim-pidf"
         xmlns:im="urn:ietf:params:xml:ns:cpim-pidf:im"
         xmlns:myex="http://id.example.com/cpim-presence/"
         entity="pres:[email protected]">
       <tuple id="mobile-im">
           <status>
               <basic>open</basic>
               <im:im>busy</im:im>
               <myex:location>home</myex:location>
           </status>
           <contact priority="1.0">im:[email protected]</contact>
           <note xml:lang="en">Don't Disturb Please!</note>
           <note xml:lang="fr">Ne derangez pas, s'il vous plait</note>
           <timestamp>2001-10-27T16:49:29Z</timestamp>
       </tuple>
       <tuple id="email">
           <status>
               <basic>open</basic>
           </status>
           <contact priority="0.65">mailto:[email protected]</contact>
       </tuple>
       <note>I'll be in Tokyo next week</note>
   </presence>

section 4.3.2 

   <?xml version="1.0" encoding="UTF-8"?>
   <impp:presence xmlns:impp="urn:ietf:params:xml:ns:cpim-pidf"
         xmlns:myex="http://id.example.com/cpim-presence/"
         entity="pres:[email protected]">
       <impp:tuple id="mobile-phone">
           <impp:status>
               <impp:basic>open</impp:basic>
           </impp:status>
           <myex:mytupleelement>Extended value in
tuple</myex:mytupleelement>
           <impp:contact priority="9">tel:09012345678</impp:contact>
       </impp:tuple>
       <impp:tuple id="mobile-im">
           <impp:status>
               <impp:basic>open</impp:basic>
           </impp:status>
           <impp:contact priority="1">
              im:[email protected]</impp:contact>
       </impp:tuple>
       <myex:mytag>My extended presentity information</myex:mytag>
   </impp:presence>

section 4.3.3

   <?xml version="1.0" encoding="UTF-8"?>
   <impp:presence xmlns:impp="urn:ietf:params:xml:ns:cpim-pidf"
         xmlns:myex="http://id.mycompany.com/cpim-presence/"
         entity="pres:[email protected]">
       <impp:tuple id="mobile-phone">
           <impp:status>
               <impp:basic>open</impp:basic>
           </impp:status>
           <myex:complexExtension impp:mustUnderstand="1">
               <myex:ex1 impp:mustUnderstand="1">val1</myex:ex1>
               <myex:ex2>val2</myex:ex2>
           </myex:complexExtension>
           <impp:contact priority="0.725">tel:09012345678</impp:contact>
       </impp:tuple>
       <myex:mytag>My extended presentity information</myex:mytag>
   </impp:presence>






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