[Squirrel-sql-develop] Latest changes

[Colin B. <col...@bi...>]

- Apache log4j is used for the logging subsystem. More information in the
plugin programmers guide squirrel-sql/doc/plugins.html and on the Apache
log4j web site http://jakarta.apache.org/log4j/
- Torn off SQL Results windows now appear in the Windows menu.
- Torn off SQL results windows can now be returned into the tabbed folder.
- New "Copy as HTML" option for SQL results (Johan Compagner).
- Copying SQL results now includes the column headings (Johan Compagner).
- Undo/redo support now added to the SQL entry area (not yet in the jedit
plugin) (Johan Compagner).
- New application argument -noplugins which will run SQuirreL without
  any plugins being loaded.
- More configuration options for the jEdit plugin.
- Bring aliases/driver window to front if action requested.
- Torn off result tabs are now closed if there session sheet is closed.
- New option on the Windows menu - Close all sessions.
- New options on the session menu - Close all result tabs and close all
Result windows.
- New Session options moved from Global Prefernces dialog to new Session
Properties dialog.
- New API added to IPlugin - INewSessionPropertiesPanel[]
getNewSessionPropertiesPanels();