Vuze 4.3.1.2

# New Features:

* Core | Added .vuze file format to trigger a search operation

# Changes:

* Core | Disable IPv6 under Windows by default, as it needs Java7 to work properly
* Core | Added system property to disable instance manager
* Core | Give user friendlier error message when offline-downloader disconnected
* Core | Auto-dump threads if shutdown takes > 30 seconds
* UI | Permit deletion of classicaly shared content from download/seeding views

# Corrected bugs:

* Core | Wait until sid registered before attempting pairing test
* Core | Various pairing HTTPS fixes
* Core | Fix missing 'logout' button when paired with no authentication
* UI | Windows - Vuze now pops up if closed to system tray and user launches exe
* UI | Fixup some Remote Pairing dialog edge case bugs
* UI | OSX - Fix sidebar animations sometimes not animating
* UI | OSX - Text in table views are now the correct color (white) when selected
* UI | Protect against case where Main Window's stored dimensions area invalid or stupidly small
* UI | Fix invalid thread access and NPE when closing pairing dialog
* UI | Fixed case where status bar was blank after deiconifying