* Added LoginPanel GUI component
* Tweaked gender detection scheme to be more accurate, though not perfect
* Moved connection-related message boxes to LoginPanel
* Several sanity checks to prevent crashing on logout/exit
git-svn-id: http://libopenmetaverse.googlecode.com/svn/libopenmetaverse/trunk@2563 52acb1d6-8a22-11de-b505-999d5b087335
