MERGE: リビジョン1672から1680にかけて行われた修正のうち、反映されてないものを追加。

MERGE: リビジョン1672から1680にかけて行われた修正のうち、反映されてないものを追加。

CHANGE: re-arrangement for ENTITY class to deal with XML and HTML
entity references.
http://nucleuscms.svn.sourceforge.net/viewvc/nucleuscms?view=revision&revision=1672

CHANGE: re-arrangement for NOTIFICATION class to deal with mail.
http://nucleuscms.svn.sourceforge.net/viewvc/nucleuscms?view=revision&revision=1673

CHANGE: re-arrangement for LINK class to deal with the URI for inner
weblog contents.
http://nucleuscms.svn.sourceforge.net/viewvc/nucleuscms?view=revision&revision=1674

CHANGE: add i18n::formatted_datetime() and deprecate dateFormat()
http://nucleuscms.svn.sourceforge.net/viewvc/nucleuscms?view=revision&revision=1675

supplemental modification for revision 1673 and 1674.
http://nucleuscms.svn.sourceforge.net/viewvc/nucleuscms?view=revision&revision=1676

supplemental modification for revision 1674.
http://nucleuscms.svn.sourceforge.net/viewvc/nucleuscms?view=revision&revision=1677

CHANGE: the value, field, constant named with 'language' are now named
with 'locale'.
http://nucleuscms.svn.sourceforge.net/viewvc/nucleuscms?view=revision&revision=1678

CHANGE: the value, field, constant named with 'language' are now named
with 'locale'.
http://nucleuscms.svn.sourceforge.net/viewvc/nucleuscms?view=revision&revision=1679

supplemental modification for revision 1679.
http://nucleuscms.svn.sourceforge.net/viewvc/nucleuscms?view=revision&revision=1680