Revision 810896

Moved the class UnicodeClasses to src/codegen/unicode, so that it is
only built when the classes.xml file is regenerated. Modified the
build file accordingly. Restored Java 5 features in
UnicodeClasses. Created a License utility class. Added a license
statement and a generated file statement to classes.xml. Made
GenerateLineBreakUtils.java use the License class, and made it avoid
trailing spaces in the generated file.