Class Browser

[Lior Mualem]

Hi,
I've brought the class browser to a satisfactory level (IMHO).
I'll be glad if you could review it.

It includes:
* Filtering ability
* Automatic updates the display to reflect the current code state
* Ability to display base / derived classes
* Doesn't use memory or DUChains if a tree item is not expanded.

It sits under kdevelop4-extra-plugins/classbrowser2 in the svn.
There's a wiki page with some of Davids ideas and mine, at
http://www.kdevelop.org/mediawiki/index.php/Class_Browser_stuff

Thanks,
Lior