Improve the release/debug build system.
Defend against allocation errors whilst indexing.
Fix build with Qt4.
Add proto for external com interface.
First implementation of external com via D-Bus.
Complete DBus external com and quit when another instance is open.
Refactor the dbus module to use a special object for registration.
Complete implementation of inter-instance loading using D-Bus.
Add "multi-instance" and "new-session" command line options.
Prevent reopening an already open file.
Make the building of D-Bus support optional.
First version of the Windows ExternalCom implementation.
Finish implementation of externalcom for Windows IPC.
Add option -l to log into a file on Windows.
Remove debug and old code in WinExternalCom.
Store the CrawlerWidget geometry with the session.
Implements Firefox style tab shortcuts.

(Shift)-Ctrl-Tab: Switches to next/previous
Alt-Number: Switch to

Fixes #62
Add website to About box.

Fixes #58
Improvement on tabs shortcuts.
Add a background task handler to the MainWindow.