Soft Feature Freeze: fixing crashes by rewriting parts of the code

[Nick Shaforostoff]

Hi everybody.

I've got a crash report, which tells me that Lokalize may corrupt glossary.
https://bugs.kde.org/show_bug.cgi?id=228459

This is because of a bad code design. I used SAX API for XML manipulation and 
obviously got it messed up.

I started rewriting glossary storage classes to use DOM API a ~month ago.
Now it is finished. I tested features like deleting entries, adding entries, 
changing term lists. The new code is more OOP-friendly and cleaner.

May I commit the patch to trunk now?

The patch is attached.
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