Public (t.broyer@gmail.com):
Uses the java.beans.Introspector#decapitalize instead of "manual
decapitalization" of setter-method names to attribute names.  This
means setHTML() can be set using an all-caps HTML="" attribute,
instead of hTML="". This applies to all all-caps setters (actually,
decapitalize won't lowercase the first char if it is followed by
another upper-case char, which means an hypothetical setIFrameName
setter for instance wouldn't be changed to iFrameName but kept as
IFrameName). Backward compatible change, so hTML="" still works.

Also fixes some compiler warnings and style errors

Review by rjrjr@google.com
http://gwt-code-reviews.appspot.com/642801

Review by: rice@google.com

git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@9536 8db76d5a-ed1c-0410-87a9-c151d255dfc7