Add a new plugins loadding behaviour:
if it's not doLocalConf mode, then plugins can be loadded from "AppData\Local\Notepad++\plugins\", without presence of "allowAppDataPlugins.xml".
[NEW_FEATURE] Add ISO_8859-1 to ISO_8859-16 encodings.
[BUG_FIXED] Fix last recent file list menu items localization encoding bug.
[BUG_FIXED] Fix last recent file number goes to zero issue.
git-svn-id: svn://svn.tuxfamily.org/svnroot/notepadplus/repository/trunk@575 f5eea248-9336-0410-98b8-ebc06183d4e3