some typos in part 1 - related to portType to interface conversion

I've noticed that when portTypes were changed to interfaces, it seems
the substitution broke some uppercasings, for example in table 18:
"Element substitution groups defined for element based extensibility"
http://dev.w3.org/cvsweb/~checkout~/2002/ws/desc/wsdl12/wsdl12.html#tabelemsubgroup
where we see element declarations such as msgAndinterfaceExt - the 'i'
should be upper case.

Best regards,

                   Jacek Kopecky

                   Senior Architect
                   Systinet Corporation
                   http://www.systinet.com/