[Kbabel] New SearchEngine

[Andrea Rizzi]

I commited the new SearchEngine, now it is in "alpha" status. It compiles and 
it is quite usable.
To create a database you should define some "sources" in the settings and then 
scan them.

To compile it add "searchengine2" in SUBDIRS 
kbabel/kbabeldict/modules/Makefile.am.

Do not rely on it. The databases created with this alpha version will not be 
usable in the future.

Bye
Andrea