Fixed an invalid javadoc method header attribute in DBSchemaEdit
Define java.rmi.server.useCodebaseOnly to true in the client launchers.

This configures the client jvms so that they won't allow class files to be
downloaded from the server.  We never need that behavior, so closing this
hole is all to the good.

Oracle made this behavior the default in their Java 1.7.0 release 21
security update, this commit takes care of it when running Ganymede
on older Java runtimes.
Updated UPGRADE2 text file
Took out the bit in README.source about seeing no warnings
Added a differently colored icon for the admin console.
Cropped Ganymede launch icons.
Tweaked colors and cropping on launcher icons
Allow our gasharl usernames to be up to 10 chars in length now
Reflowed a few javadoc headers in DBEditObject

This just to try to reduce the amount of editor line-wrapping
that users might see when viewing / editing DBEditObject
Comments and @Override in gasharl userCustom

I copied a bunch of javadoc headers from DBEditObject that
have been elaborated since userCustom was created.

I added the @Override annotation to all methods that override
DBEditObject methods.

Tabs were also converted to spaces in this edit.
Added an EmptyVector class suitable for use as a singleton empty vector.
Reworked gasharl userCustom to use Java 5 generics, enhanced for loops.
Removed some erroneous 'field changed' logging in DBEditObject.diff().

We were not properly checking to see if a field that okToLogField() returned false
for had actually changed before including it in the list of fields changed in the
result from DBEditObject.diff().
Always set diffFound in DBEditObject.diff() when we do any change logging
Don't make EmptyVector create its own immutable empty list when we can use Collections.EMPTY_LIST.
Some more Vector/List API modernization in gasharl userCustom
More modernization of Vector declarations in gasharl userCustom
Tweaked whitespace and comments in gasharl userRenameWizard
Modernized Vector/List usage, override annotations for gasharl groupCustom
Modernized Vector API usage, Override annotations, tabs to spaces in gasharl systemCustom