Cssed snapshot

Hi all,

It has been reported lately a couple of bugs on cssed that pushes me to
go for the release of a new version.

The worst of them is a segfault when closing the search dialog - among
others - when using the ESC key, caused by legacy code.

All those bugs are fixed in cvs right now.

I've just uploaded some snapshots for testing purposes and I'll most
grateful if some of you could take a test on them.

The biggest changes from last release are:
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- Added default browser: it's visible on the configuration dialog. And
right now only drives the "Cssed Help" menu item, on "Help" menu.

- Added capabilities to mark documents on different colors.

- Added document list capabilities. 

- New "go to line" dialog.

- Ability to append various css document in one long list, in the
"Digest" tree view.

- Improved and extended the plugin's API