Persistent AST and google sparsehash

[David Nolden]

> I can try and help with the library API changes.  When I did it we didn't
> get any conflicts in the merge, but it sure wouldn't build.
>

Well I remember that last time I tried to merge the plugin just didn't 
appear(but a bug in svn stopped me from uploading it so I could ask for 
help). It was after the api-change from KDevPluginInfo to KPluginInfo. 
Right now I'm recompiling everything to see how it works with the current 
KDevelop, kdelibs, etc.

I hope it will works. :)

greetings, David